Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ecaa29d3a77d32…

MALICIOUS

PDF

121.6 KB Created: 2021-06-27 16:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ae7d6f6993d57aee59cff3f01c98de21 SHA-1: 72dd544b002293afc642b0fff938ed88ae8f4181 SHA-256: f1ecaa29d3a77d32c64e16c108e8000ad916f096c9143c22d93ad9acefcbe6dd
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, specifically a browser extension or update installation scam. It contains numerous links to external sites, many of which appear to be hosted on compromised WordPress installations, suggesting a distribution network for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malware or revealing credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9702

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/uplcv?utm_term=bubble+writing+generator+copy+and+paste PDF link annotation
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/b98ff1737174b35c8777db07f2b4d66a/34974174227.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac7a278a8c---sukuxugewojedikida.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/nanm6s4hirp4924lacjamkq5d1/xunefizu.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/j2c8o1n9hcagi78qt0n3kv84b0/16920379499.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/budegisoluraw.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afba0380af---35134377068.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c4906547a52---87667793989.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f32a959c26---70387702685.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b9756e2cbd9---josunowebigipigoxaxixub.pdfIn PDF document text
    • https://peterdegendt.be/file/94089135102.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/923e85e546f8b141718afabceb71e2d3/soxofalovujesupinawojus.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/lazozilajoz.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ffb886615---zojiwogasigigig.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/25386373598.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/238d1ot6idjfp7td36p70ralgs/21960204683.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/h4egte3acphn1ulpqi2rhi8rit/ropaboguvirolutemonematel.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/ledowutagem.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a95d2f4042---66473956537.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087b3460c494---jaxal.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/boc37phifbsse7fpoci33r37d5/88463121901.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfce00a343---47975617217.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/4715d7e063600de4d8d0798100bee446/33935415974.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c97cf4e109d---kuduteno.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b81f477bcc9a0198b3b9ae3e660aada8/78615507424.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54debbfb10---nesixufifi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 27360 bytes
SHA-256: 8a08878ff3bd3eb9de7d18fe1da04794e362b7c603923ece28876e9f2628ac44
font_01_sfnt_off00017521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17521 11184 bytes
SHA-256: 5fa8f6e91ea3053be418bd9e7812f2b1414b1a66bb4e754f1c6ea796ddaea3b4
font_02_sfnt_off00018f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001a72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A72D 5092 bytes
SHA-256: 9ceb19c247cb4b4d08bfe3a7baf5d3a0e63029fe1d50b6e630e489cfbef266f4
font_04_sfnt_off0001ba3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA3E 18528 bytes
SHA-256: dccaf2216d5be16224cd13d895ab5b17601137b0dcafa69063dc0861db6c60a8

Open this report in the interactive analyzer, or submit your own file for analysis.