Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb4b0ebd2c16cea…

MALICIOUS

PDF

102.8 KB Authoring application: QPDF
MD5: 1e539c8624c433b988fcdaf6ce5c2f45 SHA-1: 4fd8da63a3153d70190505207997c16b3f38bd88 SHA-256: 7bb4b0ebd2c16cea0cfc9435deedfdc205a6f8c91586bb4ea52f91c030089838
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF SEO link farm. It contains numerous embedded URLs pointing to external PDF files, suggesting a campaign to manipulate search engine results or distribute further malicious content. The document body contains garbled text and references to 'Kuta software infinite algebra 2', which appears to be a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://majordril1ing.com/uploads/1/3/0/6/130621853/ratimo.pdf
    • http://mx.pinecrestcamp.org/uploads/1/3/0/8/130874322/c4691.pdf
    • http://facialplasticsurgery.help/uploads/1/3/0/8/130874325/jovurovujefuto.pdf
    • http://replenishmysoul.com/uploads/1/3/0/4/130483400/0b655219cd7801a.pdf
    • http://pipestoneresearch.com/uploads/1/3/0/2/130289773/f5e6bd01d8b5dd5.pdf
    • http://peacelovemonkey.com/uploads/1/3/0/6/130605492/5309496.pdf
    • http://bim7mexico.com/uploads/1/3/0/4/130483647/2c4fa962f.pdf
    • http://thriftymedia.us/uploads/1/3/0/8/130874076/xeruz.pdf
    • http://shilor.com/uploads/1/3/0/3/130379635/guvid.pdf
    • http://bbtreeservice.net/uploads/1/3/0/6/130603710/bebidemuxutota.pdf
    • http://waterresourcesmgmt.com/uploads/1/3/0/6/130620662/2689133.pdf
    • http://michaelpetersenphotography.com/uploads/1/3/0/7/130738854/102339.pdf
    • http://guangxingmianfeikaihu.br3h.com/uploads/1/3/0/6/130605332/130605332.html#kuta+software+infinite+algebra+2+special+right+triangles+answers
    • 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_off0000142a.bin
774ccb63f76ede4e62f2addec356f066e690eda27a1b02f919d8fac4249159db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142A 9696 bytes
font_01_sfnt_off0000c5a2.bin
79477627d8d1f4b02dc0c8dd25418f230659c55553ca0b2a2418ca748b08b690		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A2 17172 bytes

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