Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ac627189d084eb…

MALICIOUS

PDF

118.9 KB Created: 2021-08-15 08:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1e91c45f58e8ba312280c6beb5803cce SHA-1: 4965a266dd79b8c3d19c33867fac83d68c320aea SHA-256: 00ac627189d084eb062774a8df66c4dfe58963e13274276ade4c2d930b0e2d6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous potentially compromised WordPress sites and disposable hosting, suggesting an attempt to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://finatwork.com/userfiles/file/lumejukezeniwilasemori.pdf In PDF document text
    • http://bjsprt.com/uploadfile/file///2021060617123783.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/52514406679.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0b253b4e51d625ab6ecb69a78aba5389/29823558463.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a916b5ac041---54844982037.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/91517047890.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/82862892885.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/59u3kod6n5rik6oorh0b7mbrfo/50039908372.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b637c5bd823---44783843829.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/61912713731.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cd2373a2f---galaxu.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/96504137581.pdfIn PDF document text
    • https://datawire.gr/files/files/moxupowopo.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/73677802767.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/a3625bf3d3f5f2567d7c0db5e3d8a92c/pepasiwitezotujer.pdfIn PDF document text
    • http://www.bandungmesin.com/file/90303039973.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861292385fc---55244379480.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/jiramirimujusolezifodegil.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0844583001624652705.pdfIn PDF document text
    • https://senhewood.com/d/files/sifapabutorifa.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/82276432036.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1624189802.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/pekanerudesodigop.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/fonomodapadekarawasewoxe.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/49394616855.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/13376758558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=libro+doctrina+de+salvaci%C3%B3n+tomo+3+pdfPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18504 17536 bytes
SHA-256: 9ed17284a53bc3cdbcd46c3f4ce699f20d3f8cc55030620c551aed98d7a1ed87
font_02_sfnt_off0001b11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B11B 11252 bytes
SHA-256: 8aa34636fcb88f8f2165d1845f351c5381f283bcd116bfd1610cb7df88f98a4b

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