Malicious PDF — malware analysis report

Static analysis result for SHA-256 1180aa786f5f1fb8…

MALICIOUS

PDF

94.5 KB Created: 2021-07-30 22:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 463e23f0d5b52038d51a6b8376afbe8e SHA-1: f94cc44e45285a6648da08fc340b9e8d9b173aad SHA-256: 1180aa786f5f1fb8f2d7c80beaf13420a9f37ea5aa3f8e7079da2b3a8ecf5a2e
204 Risk Score

Malware Insights

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

The PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. It employs social engineering by presenting a 'Browser extension / update installation lure' and a 'Visual download / call-to-action button lure', aiming to trick users into downloading further malicious content. The numerous embedded URLs, many pointing to compromised CMS uploads and link farms, suggest an effort to distribute or host malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bancodevida.com/bancodevida/admin/images/image/file/vovuvakakulu.pdf In PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7a6305e9397b7b55ad50e427fa6218ef/jekora.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xipawosovebupiwedufo.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/4c571754bc8906ff08ec177851514671/68224363126.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/84221189190.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/ribilasumimorizup.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/85658140285.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/jowigawotirubolefuxiwes.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/24594989989.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/28838688348f42caa8845902de1338fe/xefarotuninujudutib.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/f19d1cb58d471682df6521006d9c14c1/36906319732.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c1045fdec---5964697865.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/79496049884.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/e3ef5718b50bf664a71412dafe249208/lavojojapinenamipujakafi.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/837fdfa6f80b57204f25abf9436fb375/xegelavujetopubosalubeja.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/59333891fa57cdb5a9c980c0b8a63b3a/19461736775.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/cc0e111b2a6e68d88cf526711c49630f/jenuta.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/10816234993.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/89259109075.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/65563004051.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/46583414496.pdfIn PDF document text
    • http://ainut.fi/userfiles/file/gufekexigasewap.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076161baa04c---tutidibox.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/28515160425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=download+avast+licence+file+till+2038PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF763 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F75 16852 bytes
SHA-256: 86a7c72ae6d32cac7ce818be5de8a614b561a3fa7969f8eed8169298c794e826
font_02_sfnt_off00013b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7E 11144 bytes
SHA-256: 49f4cdf0ae472fed40c217f8512e2f510ed7e4a316b1b955e76313a4433fd138
font_03_sfnt_off000155cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155CC 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516

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