Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77e711b013112d2…

MALICIOUS

PDF

35.4 KB Authoring application: LibreOffice
MD5: 2881cfc8ac068b79be295795c53dc397 SHA-1: 0e3e2f116ed09f5cf64a12fec5969d8b498fe838 SHA-256: a77e711b013112d241ed0511d28aed645499c1853dafc4087bc9d80130978b1e
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of a link-farming or phishing campaign. The ML classifier and ClamAV detection further support its malicious nature. The embedded URLs are likely used to redirect users to malicious content or further stages of an attack.

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://lisahatchmillinery.com/uploads/1/3/0/4/130483868/1da9577896.pdf
    • http://valdineschroeder.com/uploads/1/3/0/3/130313056/c951aff.pdf
    • http://iamjordynrose.com/uploads/1/3/0/2/130270924/ba9851a65dcc.pdf
    • http://artekcm.com/uploads/1/3/0/3/130313173/lotok.pdf
    • http://calldavid.com/uploads/1/3/0/7/130775866/dajibirelag-kajuzewimebuta.pdf
    • http://afaparents.org/uploads/1/3/0/6/130620793/130620793.html#fender+acoustasonic+15+acoustic+guitar+amplifier+review

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010aa.bin
4628b8a57cd70db343d5513705117ce28805b57823080b663f56fb01471178e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA 8408 bytes

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