Malicious PDF — malware analysis report

Static analysis result for SHA-256 be67ff9ccf58c52a…

MALICIOUS

PDF

39.9 KB Created: 2020-06-07 22:39:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c001a19b54c3ac7c6083dd1d7bfb9336 SHA-1: f1a0aca6ac0fa39e356aae38caed9b7d7e01b385 SHA-256: be67ff9ccf58c52a5f0880901b54e07a6bfb1b9949498f54d040199af1a15982
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The PDF_SEO_LINK_FARM heuristic firing confirms this behavior. The embedded URLs point to various domains, suggesting a link farm designed to distribute malicious content or phishing pages. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://crittersdressage.com/uploads/1/3/1/8/131872137/131872137.html#%25C3%25BCbungsaufgaben+bruchrechnen+pdf
    • http://travel-in-vogue.com/uploads/1/3/1/3/131379541/zoriniwedaweruja.pdf
    • http://tadhgtactoe.com/uploads/1/3/0/2/130289772/1115710.pdf
    • http://hitair-equestrian.ca/uploads/1/3/1/1/131163828/vanipofa.pdf
    • http://theflyingpigfarm.net/uploads/1/3/0/7/130739895/c1420ebe471f.pdf
    • http://wellnessivy.com/uploads/1/3/1/4/131437812/8874769.pdf
    • http://marketuponline.com/uploads/1/3/0/5/130590671/4896003.pdf
    • http://meadclub.vip/uploads/1/3/0/6/130639508/topirigumitukugusuk.pdf
    • http://infinitivemotors.com/uploads/1/3/1/3/131383720/6157237.pdf
    • https://vasameje.files.wordpress.com/2020/06/fawozipatigobijiz.pdf
    • https://mopiwiru.files.wordpress.com/2020/06/sixaxabeguwusozadewopan.pdf
    • https://sapamuwuj.files.wordpress.com/2020/06/nifapijudaje.pdf
    • https://womonuxad.files.wordpress.com/2020/06/57790647818.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005891.bin
bc62863c57b3e8ea4ab0d6a0d51d31140707a5952f0606a4e7e8a32beb04af6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5891 11068 bytes
font_01_sfnt_off00007d31.bin
cfac9f966cd83021a2129f4d750587ab41195d274fc0b1362d333d1ef3c0b582		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D31 16192 bytes

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