Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8ae6659b936ac6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-03 20:34:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4bb32b8579c413b34117edde90a55ade SHA-1: 0324f559619a1e15861e527eba1d997ecc9947ea SHA-256: 2c8ae6659b936ac6e7aeba5176b2e837a3b03bfbd2e29729da17e7bcd4e8be43
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9459

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/award?keyword=dd15+2+fuel+filter+system+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455907/normal_602ef3096e98e.pdfIn PDF document text
    • http://findattime.com/84012563595s8gby.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/how_much_is_a_playstation_3_controller_at_walmart.pdfIn PDF document text
    • https://kogozodibivuf.weebly.com/uploads/1/3/6/0/136094397/fofulig.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/how_do_i_claim_my_super_due_to_covid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5fd27c07c0f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_6030149e1167f.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/9741435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_603d333f4ab93.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/zejaki.pdfIn PDF document text
    • https://ridulajevu.weebly.com/uploads/1/3/4/3/134352946/vibivoxulevuvupo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_6035088e83de6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fajazimigig.atwebpages.com/31221388945.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE644 5636 bytes
SHA-256: 48d815196bd697c22860fa96a08cc76c65b8c57cc4edc004748a2b9096f8e6a6
font_01_sfnt_off0000f973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF973 14628 bytes
SHA-256: 5df0d23926cb8f8901b7fc86a560638e5f4efd557c9ddd401ae068257a29a4b7

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