Malicious PDF — malware analysis report

Static analysis result for SHA-256 42363a96b8190877…

MALICIOUS

PDF

37.5 KB Authoring application: PDFBox
MD5: dc875b73d395d5b6756be940884a1a7b SHA-1: 99f26169ccc750ff5a80565c302ead729bde2879 SHA-256: 42363a96b819087784e5847f378265740af28be974606c5310597dbd6dd70a60
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, and exhibits a critical heuristic for a PDF link farm. The document body, despite some corruption, contains numerous external URLs pointing to other PDF files. This suggests a phishing or SEO poisoning attack designed to redirect users to potentially malicious content or exploit kits.

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://nasty-man.com/uploads/1/3/0/4/130476320/7900514cce491.pdf
    • http://nyjincho.com/uploads/1/3/0/5/130539838/minevepelenaxij-vakoxewidil-zejap.pdf
    • http://pieceofmindproject.com/uploads/1/3/0/5/130590702/4093577.pdf
    • http://ivv-americas.org/uploads/1/3/0/6/130604554/652717.pdf
    • http://chiarraarpaia.com/uploads/1/3/0/4/130435771/tariguburu.pdf
    • http://comedianambrosejones.net/uploads/1/3/0/3/130323412/f307960283.pdf
    • http://bonkerforbyram.com/uploads/1/3/0/6/130621791/pogiwonodagus.pdf
    • http://nw4.me/uploads/1/3/0/5/130551323/7837565.pdf
    • http://quintechservices.com/uploads/1/3/0/2/130289166/2556596.pdf
    • http://nashvillebowling.org/uploads/1/3/0/5/130540065/nebewof_romixogaw_kafif.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/7/130739488/130739488.html#free+business+powerpoint+templates+design

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000123d.bin
4f83c77a5a92b46332540454aaf52e737357ea24d717c7c4a04ac4d639bf740b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D 7872 bytes

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