Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9c068fc21dfda1…

MALICIOUS

PDF

35.7 KB Authoring application: Poppler-utils
MD5: f37394bde5eaee2cb3429613ace75d3b SHA-1: 31fd4ba1d9d6588fd4122126b7772499b87dec56 SHA-256: df9c068fc21dfda1b65a63aae46e921b692328fc5461c69d9536fa51ee0205c4
150 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits a critical heuristic for a PDF link farm. The document body contains numerous embedded URLs pointing to external PDF files, suggesting a phishing or SEO spam campaign. No scripts were extracted from this sample.

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.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://orlandohobbyshop.com/uploads/1/3/0/5/130588457/214104.pdf
    • http://relocatemag.us/uploads/1/3/0/2/130287246/mepevafe_zujogifenibawaw.pdf
    • http://serpboards.com/uploads/1/3/0/5/130543029/7322935.pdf
    • http://rafalune.chama.site/uploads/2020/01/28/bilemap_gokesijevagus_xedibof.pdf
    • http://fetish7.com/uploads/1/3/0/2/130289158/b18ac10740.pdf
    • http://labcharter-pto.com/uploads/1/3/0/5/130539042/1528819.pdf
    • http://fencingaberdeen.com/uploads/1/3/0/6/130603892/a38b055429affb.pdf
    • http://mikewilliamsmusicclasses.com/uploads/1/3/0/6/130639308/8784538.pdf
    • http://mindfulevolution.net/uploads/1/3/0/2/130289002/9a96e064929bb90.pdf
    • http://whitcombhomeinspections.com/uploads/1/3/0/6/130621086/130621086.html#podadora+de+cesped+manual+ecuador

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000126a.bin
9a6fd88a4080447edb036a1431b447a571d97e48806a2d330456ff00092acd6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126A 9348 bytes

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