Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baec100d8a17930…

MALICIOUS

PDF

36.2 KB Authoring application: PDF Studio
MD5: dbc83cfa74fc23ac1eb042707122226a SHA-1: b5942f29b3df8ce81d11f69462edbeb2c31d45dd SHA-256: 8baec100d8a179301b19d0ac7e2a7945bfec1efe9154bf725a9381ec39f3b627
150 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, suggesting a tactic to drive traffic to malicious sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output further confirm its malicious nature. The embedded URLs are likely used to distribute further malware or phishing 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://be5k.org/uploads/1/3/0/2/130287529/8040049.pdf
    • https://poroxegobi.weebly.com/uploads/1/3/0/4/130489122/2651820.pdf
    • http://onewesterra.com/uploads/1/3/0/7/130776421/7452605.pdf
    • http://1hrloan.com/uploads/1/3/0/5/130551556/4831745.pdf
    • http://fethigurcan.org/uploads/1/3/0/8/130813975/foripokemoki-bixipa.pdf
    • http://connectingmoments.co.nz/uploads/1/3/0/3/130323211/metozagi.pdf
    • http://cleaningservicesresidentialcommercial.com/uploads/1/3/0/6/130604305/cee13e.pdf
    • http://mrsreid3rdgrade.com/uploads/1/3/0/2/130288854/fegumatijusal.pdf
    • http://nomegasitehere.com/uploads/1/3/0/6/130639231/mogopawo.pdf
    • http://markkraemer.net/uploads/1/3/0/3/130323285/4742725.pdf
    • http://mrdryit.com/uploads/1/3/0/2/130288710/66847e30599bf.pdf
    • http://azfairhousing.org/uploads/1/3/0/6/130621481/1d2193.pdf
    • http://benkregel.com/uploads/1/3/0/6/130620467/130620467.html#reading+worksheets+for+3rd+grade+main+ideas

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000128e.bin
ff5a02d144b242f0eab46f64eeb8ecaf0c1c2e7207f2310f4b9dd60b0f3ffbef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128E 7628 bytes

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