Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c25e90b76c91243…

MALICIOUS

PDF

39.4 KB Authoring application: pstoedit
MD5: 8f8fbcf37691c2b0bc485b206351f773 SHA-1: 1b724a3f9aa5dc09e34db6a08d181ce8b6506451 SHA-256: 0c25e90b76c9124337ae08093ed6b3f4645d45168e2ee974e8b206a6dabfa4ae
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing or SEO abuse. The embedded URLs are likely used to redirect users to malicious sites or to artificially inflate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mikaimtrading.co.za/uploads/1/3/0/2/130271054/sodatinoki_kojujivoda_gizapuwimepuka.pdf
    • http://padeljobs.org/uploads/1/3/0/5/130539120/3994344.pdf
    • http://dogsandbubbles.com/uploads/1/3/0/5/130589316/tilufekakikadusi.pdf
    • http://ahsyoungbreeders.com/uploads/1/3/0/4/130488780/zawegepuwudej.pdf
    • http://productionalgarve.com/uploads/1/3/0/7/130740432/guvezuf_vikefefitujef.pdf
    • http://v-techsnc.com/uploads/1/3/0/7/130739614/julix_nidivilikufew_bunarujewa.pdf
    • http://misskatskinks.com/uploads/1/3/0/2/130270990/makufojikalugi.pdf
    • http://masstechlaw.net/uploads/1/3/0/3/130323164/jusugom.pdf
    • http://mysoundcollective.com/uploads/1/3/0/6/130605440/130605440.html#cover+letter+for+internship+electronics+engineering

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e4.bin
1df59e1d7b5a1c9b6ea221130f9b3a394f58123acf9c749600ac3f47ff8ce04d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4 7756 bytes

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