Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c80c0ccc60d598…

MALICIOUS

PDF

68.1 KB Created: 2021-03-13 13:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79d54ecc2340ed3a17c051290cedbc6d SHA-1: 2ca93405949220252327e5386ac7cfed2759eb2d SHA-256: e5c80c0ccc60d5987052611f42c155556c575ceb55907d14462d9b089b322be4
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest the document is designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7937

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://vilenefex.ru/award?keyword=jean+anthelme+brillat+savarin+pdf
    • https://cdn-cms.f-static.net/uploads/4386595/normal_602bde9a7540e.pdf
    • https://cdn.sqhk.co/zijigemeworu/gekhihg/coloring_book_for_adults_online.pdf
    • https://pebifabo.weebly.com/uploads/1/3/4/8/134892867/lomaxomubo-takigasudolifom-gejegevimeruj.pdf
    • https://cdn.sqhk.co/goxupolofodi/fgh6aff/15210442110.pdf
    • https://cdn-cms.f-static.net/uploads/4366957/normal_60129504b223f.pdf
    • https://cdn-cms.f-static.net/uploads/4422382/normal_6033aa63eb4a0.pdf
    • https://cdn.sqhk.co/butiluluvuk/egqhcja/85661217227.pdf
    • https://cdn.sqhk.co/wofunukasu/HicDjgc/53092409737.pdf
    • http://fovikoxesaweziz.medianewsonline.com/56639123860.pdf
    • http://tesekal.mygamesonline.org/tissot_t_race_touch_manual_espaol.pdf
    • https://cdn-cms.f-static.net/uploads/4376404/normal_6014c2d728920.pdf
    • https://cdn-cms.f-static.net/uploads/4367668/normal_603f30732ad59.pdf
    • https://geguxawuxereko.weebly.com/uploads/1/3/1/3/131379712/8df9404c1.pdf
    • https://cdn.sqhk.co/movozuba/jZidOjg/best_women_s_ski_jackets_canada.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zisukuvi.atwebpages.com/what_are_the_different_types_of_industrial_estates_in_india.pdf
    • https://s3.amazonaws.com/tabobujimo/bottomsheetdialogfragment_fixed_height.pdf
    • https://s3.amazonaws.com/ginutu/can_you_build_houses_in_jail.pdf
    • https://s3.amazonaws.com/besafefaf/skyrim_se_ps4_mod_load_order.pdf
    • https://s3.amazonaws.com/fosagoba/pimowosanosupowemiguvo.pdf
    • https://s3.amazonaws.com/dixaleko/sinizimokilufekepixe.pdf
    • https://s3.amazonaws.com/musokejixami/camh_foundation_annual_report.pdf
    • https://s3.amazonaws.com/nefomojuwet/71782998598.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f267.bin
4fd4e84080230c56b415777f76e20f056c60459d9488fe74abdae6e2c66e3885		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF267 5468 bytes

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