Malicious PDF — malware analysis report

Static analysis result for SHA-256 c978775ae63a80af…

MALICIOUS

PDF

78.5 KB Authoring application: PDFedit
MD5: e50aec234ab0b83c5530603dc14c2211 SHA-1: 1a8912fd82fed02946f35ff36d1a49a2217f8e0c SHA-256: c978775ae63a80aff9f9c2168cd255324ad11a2f7295afebdb97119c0633ab4f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Avian influenza bird flu complications', suggesting a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nataliemooremakeupartist.com/uploads/1/3/0/4/130476740/tirewore.pdf
    • http://seattlebreastfeedinghikes.com/uploads/1/3/0/6/130620613/xeterinopafar.pdf
    • http://growincome.net/uploads/1/3/0/5/130550657/9e5d2fb60.pdf
    • http://analytictitan.com/uploads/1/3/0/7/130740069/pemunokig.pdf
    • http://sydneydudley.com/uploads/1/3/0/6/130605435/gibug_webevijanizoz_setititedobexur.pdf
    • http://joblock.net/uploads/1/3/0/4/130488398/8606791.pdf
    • http://www.235.ca/uploads/1/3/0/7/130739662/169e2c144b576.pdf
    • http://oslorelocationservices.com/uploads/1/3/0/7/130739897/1029246.pdf
    • http://porschasdivinediamonds.com/uploads/1/3/0/7/130740148/8c6e8b07.pdf
    • http://dawnowen.com/uploads/1/3/0/7/130738993/jimaw.pdf
    • http://kayly.net/uploads/1/3/0/3/130312998/130312998.html#avian+influenza+bird+flu+complications

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c0e.bin
de57d1a080d636fa10ccd391ede843551f6941e125c092dc54c4b23b5354c59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0E 9288 bytes

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