Malicious PDF — malware analysis report

Static analysis result for SHA-256 f31f91c5c22ba6f1…

MALICIOUS

PDF

54.0 KB Authoring application: pdf-parser
MD5: 3f6114e8adb445e8c6aa202b512e38f8 SHA-1: c55a79e30b50b624afe8ba060f98af20d25f0db5 SHA-256: f31f91c5c22ba6f1abde571936e9c6ed146a8c3ce17e7288d8497f35f95926ca
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file exhibits a critical heuristic firing for a link farm, containing numerous external links to other PDF documents. This suggests a phishing or SEO manipulation tactic, aiming to distribute malicious content or traffic. The ClamAV detection further supports its malicious nature. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

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.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://daygameinthebronx.com/uploads/1/3/0/5/130590443/pilugexawobib.pdf
    • http://crwlodge.com/uploads/1/3/0/2/130288391/jupepa.pdf
    • http://dronkadiscountstore.com/uploads/1/3/0/4/130488884/261178.pdf
    • http://brianne4housewv.com/uploads/1/3/0/4/130476442/mexumor.pdf
    • http://milesmcallister.com/uploads/1/3/0/5/130539101/gimikoposamaxu-waxew-bezebowasajuw-forozowepex.pdf
    • http://moriahgracephotography.com/uploads/1/3/0/3/130379311/zisenotazomid.pdf
    • http://rumseytownhall.com/uploads/1/3/0/2/130287401/lubagozumekifi.pdf
    • http://m311.net/uploads/1/3/0/4/130436108/mevesafutotu.pdf
    • http://nileshsp.com/uploads/1/3/0/5/130540814/57366e.pdf
    • http://9thwonderco.com/uploads/1/3/0/2/130287871/40c5ffe8fcea6f.pdf
    • http://criticaluniversitystudies.net/uploads/1/3/0/6/130621441/liradagemix.pdf
    • http://colorfulmindsaustin.net/uploads/1/3/0/6/130622061/130622061.html#pro+forma+income+statement+template+google+sheets

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001385.bin
4d8f4669b6d0bd20d77d01e4ac73dcc7dbdb313907b6ee237dbb40c399f97eca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1385 8364 bytes

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