Malicious PDF — malware analysis report

Static analysis result for SHA-256 08daa5af2a8a5fbc…

MALICIOUS

PDF

84.6 KB Created: 2020-12-27 09:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92999c7c6ef56d5d64705e6f521dd524 SHA-1: 127bf04a74c40c09e3cf70ce3a21da3ac87baafa SHA-256: 08daa5af2a8a5fbcc0cf43aa78c9b13ffaf0cb15a07053ec2f9ac8eb38728911
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, indicating a link farm or distribution mechanism for malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

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://traffset.ru/aws?utm_term=ironman+louisville+2019+race+report
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/4baad.pdf
    • https://buwupejobo.weebly.com/uploads/1/3/4/2/134265589/ruvixetawek-petev.pdf
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/c28bf7a1.pdf
    • https://static.s123-cdn-static.com/uploads/4387920/normal_5fc71e591ae93.pdf
    • https://gawejewigedek.weebly.com/uploads/1/3/2/7/132741035/1599967.pdf
    • https://cdn.sqhk.co/goluxewimabu/TRvxa2V/bujer.pdf
    • https://cdn-cms.f-static.net/uploads/4463551/normal_5fa4804143271.pdf
    • https://zitejapaj.weebly.com/uploads/1/3/1/8/131872087/0734087ce81e08.pdf
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/e5e3c6b50.pdf
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f989b7668bd3.pdf
    • https://cdn-cms.f-static.net/uploads/4407087/normal_5f935f0ed548c.pdf
    • https://cdn-cms.f-static.net/uploads/4453754/normal_5fad85088a53b.pdf
    • https://lupogupep.weebly.com/uploads/1/3/4/4/134444844/570aa5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jidosatikim/heredity_or_environment_worksheet_answers.pdf
    • https://s3.amazonaws.com/kudefem/jimulipewataxituxadabur.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012018.bin
f46d5a494cc1b688898cd859db50486e537292f22b213f43bfee441433a40057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12018 5440 bytes
font_01_sfnt_off00013274.bin
828918ef02f8a6af758d1f4954d066714ee99c1a04d67d05fb446d051c081c6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13274 10848 bytes

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