Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64f9d6ed1b82add…

MALICIOUS

PDF

35.8 KB Authoring application: Mobipocket Creator
MD5: e301df5cdb81e104f0cb46d4324dda9b SHA-1: ada7076ca316c4c67fbbef612d0a15e477e52920 SHA-256: d64f9d6ed1b82add6511a22a015bdeb2733575803d2e822c019585278bc8ffbb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicative of a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' explicitly details the mass linking behavior, with the first URL being http://pendulumhealing.com/uploads/1/3/0/5/130551126/e4709b62.pdf.

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://pendulumhealing.com/uploads/1/3/0/5/130551126/e4709b62.pdf
    • http://mycloudtoken.net/uploads/1/3/0/8/130814241/62dde687093d.pdf
    • http://popsurvey.online/uploads/2020/01/29/jovefarones_pusekebede.pdf
    • http://patronus-security.com/uploads/1/3/0/6/130604150/e6d732bacbc.pdf
    • http://lonelycatladiesclub.pet/uploads/1/3/0/6/130621152/f1efaea14b3e.pdf
    • http://vacationstressbusters.com/uploads/1/3/0/5/130589036/sosomag.pdf
    • http://ameliaquilts.com/uploads/1/3/0/3/130379113/7338174.pdf
    • http://mshannahfreeman.com/uploads/1/3/0/6/130603966/jefalunewi-lalefisuv-nezad.pdf
    • http://elkbuskencuentra.com/uploads/1/3/0/2/130291588/ba36692.pdf
    • http://advance-it.net/uploads/1/3/0/8/130874592/130874592.html#critical+path+management+def

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011db.bin
79ffd70e0199a29a413d855785d42601a963b436d348a4c16320f66a3f1f6ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB 7628 bytes

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