Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5fa660360f5ba8…

MALICIOUS

PDF

42.4 KB Authoring application: LibreOffice
MD5: 74bae67d196daae4aaaf8bdb1431dc08 SHA-1: ef9eb0fd9128eada5965999e6af0804c6a9c14cd SHA-256: 5c5fa660360f5ba8ee9bc748e86fc6e51b8a61df2d201539b2f6267e14c67329
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute further malicious content. ClamAV identified this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic detected a mass external PDF link farm. The document body itself is heavily obfuscated and contains many of the same URLs, reinforcing the malicious intent.

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://simixagplus.com/uploads/1/3/0/2/130272988/kenigasit_vubuletabo.pdf
    • http://sharonthelibrarian.com/uploads/1/3/0/3/130379147/dc48d9c200cf94b.pdf
    • http://mooretre.com/uploads/1/3/0/5/130544230/3514414.pdf
    • http://sptbgautorepairpros.com/uploads/1/3/0/4/130483244/33d42e.pdf
    • http://activatemelbourne.com.au/uploads/1/3/0/6/130620620/841247.pdf
    • http://mccallinnovations.com/uploads/1/3/0/6/130604344/395afd6.pdf
    • http://jowujekija.agicole-acces.com/uploads/2020/01/28/7084781.pdf
    • http://6000hudson.com/uploads/1/3/0/2/130289244/poxizomozeri_zonaxemupol_tebizoluvizati.pdf
    • http://musicincorporation.com/uploads/1/3/0/5/130588867/7041973.pdf
    • http://aprginc.com/uploads/1/3/0/4/130477351/16ce7f7fe1f68.pdf
    • http://navgardenforgirls.com/uploads/1/3/0/3/130323705/savovivituvofix-wivapitov-sokoligunu.pdf
    • http://cinn-fullydelicious.com/uploads/1/3/0/4/130476340/2623493.pdf
    • http://blockchainambassador.ca/uploads/1/3/0/2/130288441/130288441.html#gre+coordinate+geometry+practice+questions+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001373.bin
31efa91ba77d23a71d1d3be6d61fde3238b39ecb53f4a0435e8191642b24bcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1373 8492 bytes

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