Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c75fc113691e713…

MALICIOUS

PDF

35.3 KB Authoring application: GIMP
MD5: d0df348551cb7a0c716ccbcfe6322d68 SHA-1: 42cec72a6e8b079553f40b7b25d50440b925d6d6 SHA-256: 1c75fc113691e713b2ebf8d504715b9fc76f994c8d1b10971e9f4d79f2d80be1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, forming a link farm, which is a common technique for distributing malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating the document's primary purpose is to redirect users to other malicious PDF files. The ML classifier and ClamAV detection further confirm its malicious nature.

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.
  • ClamAV: Pdf.Dropper.Agent-7964462-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7964462-0
  • 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://www.jane-thomason.com/uploads/1/3/0/2/130272877/gajiveduxije.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/6/130639228/tekenupa_bokavevegu.pdf
    • http://royal34.net/uploads/1/3/0/8/130813330/vuwepobopuguj.pdf
    • http://www.tttaaaxxx.com/uploads/1/3/0/3/130323968/d3897017f0.pdf
    • http://e-sportsid.com/uploads/1/3/0/4/130483550/2360871.pdf
    • http://dimension4d.com/uploads/1/3/0/4/130476277/wabovojoxogep_zujuwexu_mativubexuro.pdf
    • http://tricityrealestateblog.com/uploads/1/3/0/2/130289775/vuxegudal.pdf
    • http://beachesdbt.com/uploads/1/3/0/3/130313132/aecfe036bd73.pdf
    • http://ukcitizenshipbyinvestment.com/uploads/1/3/0/6/130604416/d49d39dcdb6d4.pdf
    • http://locary.net/uploads/1/3/0/5/130589171/mozusam_votupid_nelatubibod.pdf
    • http://www.yeahviva.net/uploads/1/3/0/7/130739712/d498eebf562f20.pdf
    • http://petrolladies.be/uploads/1/3/0/5/130590384/458553.pdf
    • http://stagedoorproof.com/uploads/1/3/0/6/130620712/c01eb9c5dc4ed.pdf
    • http://74-123-78-79.mgwnet.com/uploads/1/3/0/6/130639486/130639486.html#cover+letter+builder+resume+genius

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e8.bin
18fa91c929377112804f1c5a7749cdc0861501ec317d82ce1e349d58c2c2e3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31E8 7688 bytes

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