Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a81e6f98520d84…

MALICIOUS

PDF

49.0 KB Authoring application: pstoedit
MD5: 330b9df0f9d708e74840995b0f696ba5 SHA-1: c2f35b4c99c554b5d5c493114adf466f021d1471 SHA-256: 45a81e6f98520d84dd256e392bf04e6a86e7a886e3f40ae5bd70d5a84f216ccf
150 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, as indicated by the PDF_SEO_LINK_FARM heuristic. This suggests a phishing or SEO manipulation campaign. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, and the document body is heavily corrupted, preventing a more detailed analysis of the lure.

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://accipiterbikes.com/uploads/1/3/0/6/130620963/gilokevujikile_tekogovij_kawebewi.pdf
    • http://sylteszeri.com/uploads/1/3/0/7/130775092/6849238.pdf
    • http://sustainguitar.com/uploads/1/3/0/5/130551653/6f58bc76304b.pdf
    • http://mohawk.chambernation.com/uploads/1/3/0/5/130588210/a96bb97f.pdf
    • http://msiclick.com/uploads/1/3/0/3/130379653/1804f042cfbb927.pdf
    • http://caleb123.com/uploads/1/3/0/4/130488073/keveludaweja.pdf
    • http://wishfulvintage.com/uploads/1/3/0/5/130543305/364afb.pdf
    • http://swaynami.com/uploads/1/3/0/5/130545021/jorewudasepojoluxaza.pdf
    • http://tumbledown-cottage.co.uk/uploads/1/3/0/5/130551013/339a3f1.pdf
    • http://reboundat.com/uploads/1/3/0/7/130775750/130775750.html#maze+runner+kill+order+movie+release

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000126c.bin
af15408f5a229382dfd1fdd34a9df46815b0c3dec37059e2822915ba996495bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126C 9436 bytes

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