Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9f5f3940edff24…

MALICIOUS

PDF

39.2 KB Authoring application: pdf-parser
MD5: c3d6e9eba4609a651a3ec6650c4df69e SHA-1: bc879def2f8ea29fee6ed89005d866bd7fe22ab4 SHA-256: 0a9f5f3940edff24660db6fa210d9f209f745180f00c758eafca0b7c835199be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm pointing to other PDF files, a common technique for distributing malware or conducting phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://buttimtrade.com/uploads/1/3/0/7/130738943/gekefanezujedu.pdf
    • http://glamorousthreadsboutique.com/uploads/1/3/0/6/130605018/9693879.pdf
    • http://makemoneystreaming.com/uploads/1/3/0/6/130604187/34caba73d23.pdf
    • http://nses.northsmithfieldschools.com/uploads/1/3/0/2/130271073/e8619194076.pdf
    • http://dottisvintage.com/uploads/1/3/0/6/130640239/1782540.pdf
    • http://fijibeauty.shop/uploads/1/3/0/6/130604729/2ca2535b.pdf
    • http://nubiangoatskentucky.com/uploads/1/3/0/4/130476984/6867598.pdf
    • http://segaslots.com/uploads/1/3/0/5/130551949/9462826.pdf
    • http://leasidearena.com/uploads/1/3/0/7/130738946/9034160.pdf
    • http://charlidrawz.com/uploads/1/3/0/3/130313612/2874c.pdf
    • http://technowiseservice.joelnoval.com/uploads/1/3/0/5/130545128/8614656.pdf
    • http://www.amirahhutchence.com/uploads/1/3/0/7/130738497/majululageb.pdf
    • http://thesweetmission.com/uploads/1/3/0/3/130323603/130323603.html#simple+past+tense+irregular+verbs+test
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000028e6.bin
4aabc685fdefa7cb00fb83576b947d619750ab5d22e963b22dfe0fbddc14781b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28E6 16232 bytes
font_01_sfnt_off000040e1.bin
9a6f34edf4f2f0e12da9698c7bd5254f05efcf1a31a3ff0c11217c46cff55a2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40E1 7996 bytes

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