Malicious PDF — malware analysis report

Static analysis result for SHA-256 a126e8ecf3066187…

MALICIOUS

PDF

92.8 KB Created: 2020-04-11 08:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9fb589527aeb93489ca8aed2a0b9ac0a SHA-1: 5aaf65612575fc07a7a7a4f74f6be9741b3e8e0e SHA-256: a126e8ecf3066187afdc76fe3512775a4691ebb0579ae46d7b679a876f4abd12
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, a technique often used for SEO manipulation or to distribute malicious content. The PDF_SEO_LINK_FARM heuristic specifically identifies this pattern. While no scripts were extracted, the sheer volume of outbound links suggests a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9576

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://advance-it.net/uploads/1/3/0/4/130436431/130436431.html#linear+algebra+and+its+applications%2C
    • http://mariaamparoholmes.com/uploads/1/3/0/5/130588728/finogufa-gilojuse-piwetovuto.pdf
    • http://eatsylviaeat.com/uploads/1/3/0/8/130813381/kinemofunama.pdf
    • http://jaysaaddison.com/uploads/1/3/0/8/130874143/wisesiza.pdf
    • http://skycampgreenwich.org/uploads/1/3/0/9/130969712/50d141874d.pdf
    • http://takeastance101.com/uploads/1/3/0/4/130489361/4430924.pdf
    • http://s-w-p.org/uploads/1/3/1/4/131453199/xubasuwefida_fowuwuzixox_xevox.pdf
    • http://mta-sts.mail.julia-ludwig.com/uploads/1/3/0/5/130588948/detidowazefapi_tewan_xesuzafa_duduz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ae8.bin
c6336fd58a77a4a646ea8b0199800a2e0a52b74451988329123e985e62b8c645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE8 10152 bytes
font_01_sfnt_off00013ffb.bin
f616d481bd7c7114ed3f96d20d0844e595fa5ccb1fd508ccc8702c4444648897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFB 3012 bytes
font_02_sfnt_off00014ab2.bin
784c921a8b885521974ea91c22793081fb3a58d430e1befb0f87f6ce495a3cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB2 17224 bytes

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