Malicious PDF — malware analysis report

Static analysis result for SHA-256 546aa92a180e4c05…

MALICIOUS

PDF

76.3 KB Created: 2021-04-01 06:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4edf4d64e082fa1e48f6dddf469cf14f SHA-1: 9bc1620b304434b26037da30c271142435f85956 SHA-256: 546aa92a180e4c058662616700f2b583877286b4c41582f22de48437ad3bc3af
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism to potentially malicious sites. The document body, though heavily obfuscated, appears to be related to search engine optimization and potentially lures users to external URLs like https://pelibifir.ru/award?keyword=azure+cli+commands+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9246

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://pelibifir.ru/award?keyword=azure+cli+commands+pdf
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/2178171.pdf
    • http://zabopibisoxe.22web.org/50830118586.pdf
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/549c88c0962cb8.pdf
    • http://bobatorosas.mypressonline.com/punaloxesem.pdf
    • http://wemuwetafivaxe.sportsontheweb.net/edit_file_online_and_save.pdf
    • http://pubofumoxo.scienceontheweb.net/avivamento_pais_de_gales.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nafoxuda/aged_care_guide_wa.pdf
    • https://s3.amazonaws.com/nimuwet/24068671336.pdf
    • https://s3.amazonaws.com/dezajok/9338797776.pdf
    • https://s3.amazonaws.com/xuzed/posi_joists_prices.pdf
    • http://dusiwesidixe.epizy.com/fusexozoda.pdf
    • https://uploads.strikinglycdn.com/files/4f4334d3-3708-4cf7-b6c3-fc50d360f8a3/39620673546.pdf
    • https://uploads.strikinglycdn.com/files/118010fa-de5a-48d1-ad0a-4e7785c040d3/76600731083.pdf
    • https://s3.amazonaws.com/varolexexus/divine_ire_build_guide.pdf
    • https://s3.amazonaws.com/fotepopunaj/automatic_clicker_for_android_marshmallow.pdf
    • http://tipokeviti.atwebpages.com/45971121489.pdf
    • https://s3.amazonaws.com/gisujubolidine/the_expert_at_the_card_table.pdf
    • https://uploads.strikinglycdn.com/files/78bf5cb5-1e99-4487-92d1-b949e81900fb/60630277518.pdf
    • https://uploads.strikinglycdn.com/files/81495081-fe28-426f-b2bf-190241db8794/59372720000.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fee.bin
65683a657f3732f26de3b8d61268ee273571e8fd046d026f036c1adce50e9020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEE 5340 bytes

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