Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c8154790b21cbf…

MALICIOUS

PDF

70.9 KB Created: 2021-03-16 13:15:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ecc76df3f15081ea930dc647754f021 SHA-1: 13a68d399bd1939cbcdee664b6da9c2ebe2851e1 SHA-256: 80c8154790b21cbf717ce588825021afc8dd12360b61bbbc0ba6ef8db0671ec3
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a suspicious domain 'maypoin.ru' that is likely used for phishing or malware delivery. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

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://maypoin.ru/award?keyword=3+branches+of+government+worksheet+pdf
    • https://cdn.sqhk.co/liripudeb/dLZErm4/51099727793.pdf
    • https://cdn.sqhk.co/kasesiseb/sCatthh/doxidenasase.pdf
    • https://cdn.sqhk.co/gojikanemiju/CcjMdji/bofigowuriz.pdf
    • https://cdn.sqhk.co/fidapulano/UifhaAZ/yeti_hunting_monster_survival_game_3ds.pdf
    • https://cdn-cms.f-static.net/uploads/4368494/normal_602ca81d04eb5.pdf
    • https://cdn.sqhk.co/bapisolel/f6Zx1ii/3672563247.pdf
    • https://cdn-cms.f-static.net/uploads/4418777/normal_6011f414f0ec9.pdf
    • https://cdn-cms.f-static.net/uploads/4378164/normal_602895d3bdf0e.pdf
    • https://cdn-cms.f-static.net/uploads/4496571/normal_601aa416da17f.pdf
    • https://cdn.sqhk.co/xorilulog/higqHje/pador.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/986f247b-c0ec-40bb-8103-c69d96292433/dokiniroveselakopamiwol.pdf
    • https://uploads.strikinglycdn.com/files/cd48b6c2-7f84-4a4c-96eb-e56d443c802e/91672627121.pdf
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_1ecf85e652fc4671bf3c415b02ed9db7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/897dff29-87fb-463a-858b-9ecf286e1208/honda_ruckus_service_manual.pdf
    • https://s3.amazonaws.com/zerepuzuze/the_bent_twig_isaiah_berlin.pdf
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_9c966b26f9624d5c9522af1febfb779b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ac5fae8b-8629-4a20-bbc7-27c35360a8c3/how_to_pronounce_latin_word_gratia.pdf
    • https://s3.amazonaws.com/widiku/ubiquiti_picostation_m2_default_password.pdf
    • https://s3.amazonaws.com/rizijubovapuk/safowamokarefizada.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa9b.bin
49460719744f833ef51136df38cb3fc69d7873e1615960bffed5af27ec5e7dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 5700 bytes

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