Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a71134ca0e9a748…

MALICIOUS

PDF

81.8 KB Created: 2021-03-19 10:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11187dae2779a0a6ad041b59fd88183d SHA-1: 05f4ea0890a44c4c81ef2425db1b1a488030b3ee SHA-256: 5a71134ca0e9a748f89a91da3eb8597b6ddde2fee5d363b8a23f08897ece15c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many of which are SEO-optimized and point to other PDF documents, suggesting a link farm or content stuffing tactic. The primary URL, 'https://bologen.ru/award?keyword=affairscloud+current+affairs+pdf', is likely intended to lure victims to a malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, possibly for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7716

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=affairscloud+current+affairs+pdf
    • https://dipakexamima.weebly.com/uploads/1/3/1/0/131069759/duwejigovisalot.pdf
    • https://cdn.sqhk.co/bosesegivu/egiShaV/boy_hairstyles_2020.pdf
    • https://fudosabitewixo.weebly.com/uploads/1/3/1/6/131636852/mebonebutumujuripoxu.pdf
    • https://cdn.sqhk.co/nekuripafi/Ijjbqzz/html_template_tag_alternative.pdf
    • https://muduvikude.weebly.com/uploads/1/3/4/4/134483108/refinofarinege-mofedunale-dutukepapufovu.pdf
    • https://momiweporav.weebly.com/uploads/1/3/4/7/134745900/mevawigavurob_lalekaguw_bovodefurezajeb.pdf
    • https://cdn-cms.f-static.net/uploads/4493597/normal_5fd314e9a164a.pdf
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5fe92de0d370c.pdf
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_44e28cb72e464351a249adf8006751a4.pdf?index=true
    • https://6b9ff03a-ef48-417a-a14c-919df0f903d0.filesusr.com/ugd/f459ea_41f36da125d742f7a19f68a8228b5acb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/eef2976b-e8ad-497c-a6ec-5c063e141640/will_there_be_a_season_3_of_the_magic_school_bus_rides_again.pdf
    • https://uploads.strikinglycdn.com/files/91be95d7-5baf-414d-affb-92bbbbb1ee57/48782212934.pdf
    • https://uploads.strikinglycdn.com/files/b6dafee1-aa4d-4be9-9ea4-9ecf5daf28bf/donde_esta_eduardo_chapter_5_summary.pdf
    • https://uploads.strikinglycdn.com/files/6a716f48-fb74-4cd8-b563-85a19174f3bc/how_to_size_mini_split_ac.pdf
    • https://uploads.strikinglycdn.com/files/759b746b-73bf-4310-9879-ca632d932d8a/labujexajid.pdf
    • https://uploads.strikinglycdn.com/files/3ae209fb-211d-4f2c-b274-2797d890b069/libuki.pdf
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_fb793ce1a1604595b44532c704df4758.pdf?index=true
    • https://uploads.strikinglycdn.com/files/49548dfa-fdb5-4597-abbe-e8003f5169b8/87883503834.pdf

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