Malicious PDF — malware analysis report

Static analysis result for SHA-256 7debcac391cc0a55…

MALICIOUS

PDF

47.6 KB Authoring application: Poppler-utils
MD5: 56bd304935d1ff61d37a262e212cf3e4 SHA-1: 7668032fa4a9ffcd1f249785b28c82e5c66c2b47 SHA-256: 7debcac391cc0a559cef73f31bf024e58c73d464fbf4d8dff3f4640dff68c674
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains, indicative of a link farm or content distribution network. ClamAV and ML classifiers flagged this file as malicious, specifically identifying it as a phishing or SEO-related threat. The embedded URLs are the primary IOCs, suggesting the document's purpose is to redirect users to potentially malicious or spam content.

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://decojewelry.net/uploads/1/3/0/2/130289341/75e45ca92d.pdf
    • http://salvosurfboards.com/uploads/1/3/0/3/130323341/9750129.pdf
    • http://norcalsetac.net/uploads/1/3/0/6/130639269/kazeleteraluma.pdf
    • http://pdxpersonalinjurylaw.com/uploads/1/3/0/6/130620375/ea8907e857c2b9a.pdf
    • http://mylaurabelle.com/uploads/1/3/0/3/130323599/wujoxesunajo-subiwiwotavu-mumafapo.pdf
    • http://batterizy.weebly.com/uploads/1/3/0/6/130639895/zinagalomiwa.pdf
    • http://michelleveixmccartan.com/uploads/1/3/0/5/130589412/f2de311268.pdf
    • http://emersoncurtisbradford.com/uploads/1/3/0/4/130488181/297890.pdf
    • http://miami.momotombochocolatefactory.com/uploads/1/3/0/6/130621447/130621447.html#4+times+table+division+facts+worksheet
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000139d.bin
871a8257c1cf6a1a3b09881cc93a2147386021d6438a010006b1a14e59888dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139D 8624 bytes
font_01_sfnt_off000073ab.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AB 16204 bytes

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