Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea07bcbe7bfec572…

MALICIOUS

PDF

28.5 KB Authoring application: PDF Studio
MD5: ec4654cbef1264ee75a062ad8b17044e SHA-1: 8724c5c9c10f15189f7207557b9a0f3e199cbcd0 SHA-256: ea07bcbe7bfec57243451c437e7c8987dc83d5ebb23466a92c1b3caf81af0eb9
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicating a link farm or redirection strategy. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest a phishing or traffic-driving campaign. The ML classifier also flagged this as highly malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://danwalkerwoodworks.com/uploads/1/3/0/5/130589322/3430033.pdf
    • http://northeastgridironpromotions.com/uploads/1/3/0/5/130588336/9224804.pdf
    • http://artm.website/uploads/1/3/0/5/130540420/458618.pdf
    • http://taocostarica.com/uploads/1/3/0/5/130590717/348693.pdf
    • http://visionfundsd.com/uploads/1/3/0/4/130476791/togipanipabu_nepuz_xinupulixod.pdf
    • http://amyeschlimanteachingportfolio.com/uploads/1/3/0/5/130590509/wigizukawojilusa.pdf
    • http://cameronbaskin.com/uploads/1/3/0/5/130547078/130547078.html#banner+background+vector+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000103c.bin
f3bfe912b49ab0731d2a2c39c82573d1f487708e6dc4188a4e0f1a58976ebaf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103C 6908 bytes

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