Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2ecb8fdcfbc89e…

MALICIOUS

PDF

65.9 KB Created: 2021-09-04 21:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 3078fc0f1515afa0788b813f5d67edd3 SHA-1: fdf40dc8a09766c6774af5ed4f883fdb88d83345 SHA-256: 2b2ecb8fdcfbc89e2ca2f57470c835fa70575b75ec18901d9ee6757af5053c4e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a phishing trojan by ClamAV. It contains numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded PDF link farm heuristics indicates an attempt to obscure the final destination and potentially evade detection. The document body is heavily obfuscated and unreadable, but the overall structure and URL analysis strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

Heuristics 5

  • 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
  • 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://synerhu.ru/uplcv?utm_term=physics+for+scientists+and+engineers+6th+edition+tipler+pdf PDF link annotation
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d44f8f25cb1---31798774878.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087fcdd64b3e---85261772057.pdfIn PDF document text
    • https://smallislandcurry.com/wp-content/plugins/super-forms/uploads/php/files/42b45c00754c918cfa846a7e1e619565/bulojunurimitoxiw.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210723_C02D3F683495FB3A.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/76e15113685988685de7dbb1ffefa5d6/37090192906.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/48502823506.pdfIn PDF document text
    • http://shepardfarm.com/clients/877021/File/90116862365.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16128be9142820---zepoj.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86a0b77594---22580803419.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb855152d2---48521253398.pdfIn PDF document text
    • http://dgn89reunion.com/clients/862287/File/reves.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c8855d537---pamapazujuz.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/80d1969b642eb255fc2ba2d535023082/gebivekosafegabog.pdfIn PDF document text
    • http://flexa.cz/docs/file/53667171236.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/83095391941.pdfIn PDF document text
    • http://wjcopy.com/upload/files/44193694579.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/gojetazedogif.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/mevusujuvatusafetowowe.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/wekokumegi.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/dotafulufefusimezexegamer.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf2912e098---nakawesibeguwixi.pdfIn PDF document text
    • http://thediamangroup.com/_images/files/93130001116.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/8850405226.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/cf91183a70dd435c3242f592df25e32d/vogegalivenanoxiragitefag.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 11184 bytes
SHA-256: 79cda1440ebafd60a662705e6ee91fe86fc3b65579285bb14a588c4c139a7f91
font_01_sfnt_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1