Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9ac2051caf3af7…

MALICIOUS

PDF

24.3 KB Created: 2020-04-23 17:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 661fca3214b33655b8994d3ecf854684 SHA-1: e4cb5167ec289aef397a2af2ebb26282236a25eb SHA-256: bc9ac2051caf3af7ffd83c31173f2814eb3cfd597a84eccb4ffcc17ac1fe8928
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. These links point to various domains, all hosting PDF files with similar numeric or slug-based naming conventions. The document body contains garbled text and a reference to 'Dibujos colorear dinosaurios pdf', suggesting a lure. The primary attack pattern involves directing users to a network of linked PDFs, likely for malicious redirection or SEO spam.

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://maaloufindustries.com/uploads/1/3/0/7/130739829/130739829.html#dibujos+colorear+dinosaurios+pdf
    • http://amazingprevention.com/uploads/1/3/0/3/130379289/cf04bdbd5.pdf
    • http://kevinmboggs.com/uploads/1/3/0/4/130483867/bitelodolibeg.pdf
    • http://waveofcreations.com/uploads/1/3/0/8/130813146/gesazipiv_rilexodiduwup_bupotuzemut.pdf
    • http://rnjsmoked.com/uploads/1/3/0/7/130738944/bawomunidilujo_bewuxowix.pdf
    • http://esportsfloors.com/uploads/1/3/0/2/130271143/zazisoz-goxisuv.pdf
    • http://stellarnonprofits.com/uploads/1/3/1/1/131164545/terixamatejenigupa.pdf
    • http://stjohnvianneymorisset.com/uploads/1/3/1/6/131607230/31d7f1e756bb.pdf
    • http://wholistical.org/uploads/1/3/1/4/131407408/ed3e34cbc8.pdf
    • http://danielgann.com/uploads/1/3/1/0/131070737/c181ed557f.pdf
    • http://supermayday.com/uploads/1/3/0/7/130775151/8c92b1f71.pdf

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