Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc4b18f8a13c61b…

MALICIOUS

PDF

42.5 KB Authoring application: pdf-parser
MD5: e6d0dcf467a8262f416170bef472d5ea SHA-1: 123e66cf11ee541c9d01a7fc713c8c05d18fee1b SHA-256: afc4b18f8a13c61b787bb91023f98380b4d8566032cb89a83b642c579a3e599d
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF_SEO_LINK_FARM heuristic. This suggests a phishing or malware distribution attempt, aiming to direct users to malicious content. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports the malicious intent. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of compromise.

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://coachharrisbiologywebsite.com/uploads/1/3/0/6/130621337/vevenazimen-roxawax.pdf
    • http://camocarriers.com/uploads/1/3/0/5/130589165/4a5221a912.pdf
    • http://200jobs.com/uploads/1/3/0/4/130483158/6f034f.pdf
    • http://midwest-grow.com/uploads/1/3/0/6/130604430/d446c46b501772.pdf
    • http://sally-fox.com/uploads/1/3/0/2/130291696/8422399.pdf
    • http://spacharter.org/uploads/1/3/0/6/130639164/6959791.pdf
    • http://n4-student-rentals-accommodation-housing-manor-house-london.co.uk/uploads/1/3/0/7/130738978/rigajek.pdf
    • http://my-bwk.com/uploads/1/3/0/5/130590357/130590357.html#ielts+speaking+test+topics+and+answers

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000132b.bin
e1a88149d3ebcabc562a565f231ca16664837a9f0a9829c82134d10427164842		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132B 8240 bytes

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