Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f5d7843695cc2d1…

MALICIOUS

PDF

33.6 KB Authoring application: Solid Converter PDF
MD5: ce3e4265b38916d98cf238bf744bb41e SHA-1: 52f754f27701706d7da7851eddecdef4e3b7f657 SHA-256: 4f5d7843695cc2d12c9df5900198ec4818fc95e78f27de89e1b3197b0a71ffc6
150 Risk Score

Malware Insights

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

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 and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://farmersmarketdog.com/uploads/1/3/0/3/130379398/2749719.pdf
    • http://namleps.com/uploads/1/3/0/5/130551399/a4009a0e8f0.pdf
    • http://willtarrant.com/uploads/1/3/0/8/130813740/8531465.pdf
    • http://brewery-safety.com/uploads/1/3/0/2/130272080/1cf79.pdf
    • http://dibbledabblemedia.com/uploads/1/3/0/7/130775047/792de2d2e.pdf
    • http://ooredooindonesia.net/uploads/1/3/0/5/130590366/6559252.pdf
    • http://alicezeng.com/uploads/1/3/0/6/130620847/voduko.pdf
    • http://infrawerxtech.systems/uploads/1/3/0/4/130483587/5209288.pdf
    • http://coffeygrande.com/uploads/1/3/0/7/130738771/86156.pdf
    • http://www.nahnsen.de/uploads/1/3/0/5/130589309/fopotut_diwetunad.pdf
    • http://extperformance.com/uploads/1/3/0/5/130589125/jaduregutasi.pdf
    • http://akpartnership.org/uploads/1/3/0/5/130551611/buxugobetaj.pdf
    • http://questswim.com/uploads/1/3/0/7/130776175/bd45da.pdf
    • http://anniemaegreen.com/uploads/1/3/0/6/130621666/7484439.pdf
    • http://listenupmedia.net/uploads/1/3/0/6/130605325/tesomob.pdf
    • http://webmail.rachellacey.com/uploads/1/3/0/6/130605089/9222088.pdf
    • http://haiyi-thegoodhotel.devsite-1.com/uploads/1/3/0/5/130588944/130588944.html#epidemiology+of+staph+aureus

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002861.bin
11d832fe53e5684529f0c303b889ebb24349878f58bba3c9f393a1c288cc4452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2861 7812 bytes

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