Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b358a72b6f39a3…

MALICIOUS

PDF

35.2 KB Created: 2020-06-04 17:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86fe1ea08aa7931d0503b20dfb5e87a3 SHA-1: fa53830563b2c9ccf3fefe8de04ccc9dc3c8acad SHA-256: c8b358a72b6f39a3fe0ea5dd213bec6e8404b660eef2ce2d8db8bd98cac6ed9f
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO poisoning attempt. The embedded URL also directs to an external HTML file, likely part of the same malicious infrastructure. No scripts were extracted, limiting the analysis of direct payload delivery.

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://392.undesirable.us/uploads/1/3/0/2/130289369/130289369.html#tannoy+sfx5+1
    • http://westyswood.net/uploads/1/3/0/2/130288392/rivijarijofi-welumomefonur.pdf
    • http://glacux.com/uploads/1/3/1/0/131071210/f4ec8937.pdf
    • http://simplyearthessentialoils.com/uploads/1/3/0/5/130590677/botasakeriso.pdf
    • http://jacobellefarm.com/uploads/1/3/1/4/131406784/mowifem.pdf
    • http://connectmom.org/uploads/1/3/0/9/130969184/d1dd711e5e2.pdf
    • http://marissamcdonnell.com/uploads/1/3/0/6/130621788/6ef3504a.pdf
    • http://climateisotopes.net/uploads/1/3/1/8/131871650/77fe16a510.pdf
    • http://soulfulllashes.com/uploads/1/3/0/7/130775635/514036.pdf
    • http://392.undesirable.us/uploads/1/3/0/2/130289369/terms.html
    • http://392.undesirable.us/uploads/1/3/0/2/130289369/dmca.html
    • http://392.undesirable.us/uploads/1/3/0/2/130289369/policy.html
    • https://www.richer
    • https://boletibuxo.files.wordpress.com/2020/06/vorotafarifumofafiramijen.pdf
    • https://mufumileroko.files.wordpress.com/2020/06/miwokadok.pdf
    • https://jinamid.files.wordpress.com/2020/06/juwuzitominovoliziku.pdf
    • https://www.richersounds.com/tannoy-sfx5-1-sil.html
    • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eeb.bin
0aa85b7516bd458a1a4d778db029d05096ce3914f9906947c4d2571834a92fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEB 10204 bytes

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