Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10877e890204c75…

MALICIOUS

PDF

29.8 KB Created: 2020-04-19 21:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 870fcebb99dff8dd4a3d0603c9ee7b7c SHA-1: 268749ab373eefbf1896a4049d8049985940842c SHA-256: d10877e890204c75798b766adb5d0fd70f3ac5e9a168c2320c9e3d1545a62472
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Malware.Agent-9902532-0' strongly suggests malicious intent. No scripts were extracted from this sample, but the extensive link farm indicates a delivery mechanism designed to obscure the ultimate malicious payload.

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.Malware.Agent-9902532-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9902532-0
  • 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 http://theresabuechler.com/uploads/1/3/1/4/131438517/131438517.html#jumbled+sentences+worksheets+for+class+7
    • http://alaskansuntanning.net/uploads/1/3/1/6/131606118/81681c.pdf
    • http://ivory-group.net/uploads/1/3/0/7/130739022/betanafupolomalejed.pdf
    • http://uptownduplex.com/uploads/1/3/1/1/131163782/681939.pdf
    • http://tcsonline.net/uploads/1/3/0/5/130551746/vesejap-jonijudupinuxob.pdf
    • http://rootsfunctionalmedicine.org/uploads/1/3/1/6/131606203/dinimisi.pdf
    • http://lenasboutiqueofsweets.org/uploads/1/3/0/9/130969415/timujifuwavafu.pdf
    • http://purejoys.com/uploads/1/3/0/6/130603803/tobedegupifa.pdf
    • http://kwlcustomrentals.com/uploads/1/3/1/3/131381804/6376106.pdf
    • http://alysbeachweddings.com/uploads/1/3/1/3/131380842/silakibexap-pudum-keroru.pdf
    • http://martinwarehouse.net/uploads/1/3/0/9/130969965/38460b29d1.pdf

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