Malicious PDF — malware analysis report

Static analysis result for SHA-256 db51b67dc5790c90…

MALICIOUS

PDF

55.7 KB Authoring application: LibreOffice
MD5: d0854ce8f634549137a4e9ec036b475a SHA-1: 7150b271ae2657505eab00557b0c7318cc384312 SHA-256: db51b67dc5790c9052c052e18a7acc4e07924a71fdb76c473dd467b67fe075d5
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing or malware distribution. The document body, though partially corrupted, mentions 'Tratamiento nutricional para cancer de esofago pdf', likely a lure to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://emilyschider.com/uploads/1/3/0/7/130775123/488737.pdf
    • http://caregiversofelpaso.com/uploads/1/3/0/4/130488736/jugifijexugifa.pdf
    • http://www.robthompsonmassage.com/uploads/1/3/0/6/130604730/nijim.pdf
    • http://tahitianvillageapartments.com/uploads/1/3/0/5/130544468/niridexugopaxe.pdf
    • http://threetwodesign.com/uploads/1/3/0/5/130551343/gasizikez.pdf
    • http://findeserie.org/uploads/1/3/0/7/130739809/soxowoxiwo.pdf
    • http://riveras.net/uploads/1/3/0/2/130287281/aee783e.pdf
    • http://travelcharmer.com/uploads/1/3/0/7/130740186/ribolovisugafideja.pdf
    • http://mohairregrowthsystem.com/uploads/1/3/0/7/130740193/4527587.pdf
    • http://tau.gent/uploads/1/3/0/6/130639746/fetob.pdf
    • http://impactjapan24.com/uploads/1/3/0/6/130604110/5f83a.pdf
    • http://xinpujingyulechengruhecunkuan.br3h.com/uploads/1/3/0/6/130604546/130604546.html#tratamiento+nutricional+para+cancer+de+esofago+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000019c9.bin
073c887e3c111134080f3402c1bc1894d9a63a0e0a816cb14fd57c71f97b9b8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19C9 8860 bytes

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