Malicious PDF — malware analysis report

Static analysis result for SHA-256 50345ab97f7f52c1…

MALICIOUS

PDF

55.1 KB Authoring application: Pdftk
MD5: e96eb71d9ad0c502dadd69a7cd3ddd41 SHA-1: 5a1d8d57c3f52e494d24b88500798a5c139c1858 SHA-256: 50345ab97f7f52c12eb37ae4246109b48bc57c99ad1733534b392edc88c72893
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to other PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection further confirm the malicious nature of this PDF, likely used for phishing or distributing further malware. 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://mxmsupport.com/uploads/1/3/0/8/130813314/tiwusugeziliv.pdf
    • http://phsmostl.com/uploads/1/3/0/2/130288341/21ab15846.pdf
    • http://ns1.ffol.org/uploads/1/3/0/5/130540406/rimemulapojakixepal.pdf
    • http://engineeringally.com/uploads/1/3/0/7/130776592/b96d31.pdf
    • http://elder-well.net/uploads/1/3/0/6/130621511/5906664.pdf
    • http://lembio.co.uk/uploads/1/3/0/5/130541285/7465719.pdf
    • http://bengalipoker.com/uploads/1/3/0/5/130588145/70345.pdf
    • http://www.gbubeeremoval19.com/uploads/1/3/0/6/130604030/7376643.pdf
    • http://federalbackgroundchecks.org/uploads/1/3/0/6/130604085/nodavuresafoti.pdf
    • http://creatingthespaces.com/uploads/1/3/0/6/130621214/jorojapiv-kuvurigukuk-favogowu.pdf
    • http://www.theyearofmytranformation.com/uploads/1/3/0/5/130589108/1760419.pdf
    • http://thepanameijourney.com/uploads/1/3/0/6/130620176/8756494.pdf
    • http://tarrantcountykids.org/uploads/1/3/0/5/130545985/tasikaxu_fiwivufoba_sugewewejivuni.pdf
    • http://eightdaysmediatestsite7.com/uploads/1/3/0/5/130588452/1b9f39.pdf
    • http://peoriatraditionalboosterclub.com/uploads/1/3/0/7/130776213/8779333.pdf
    • http://74-123-77-9.mgwnet.com/uploads/1/3/0/9/130969386/130969386.html#the+origins+and+demise+of+south+african+apartheid

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001145.bin
37949df56ef11c7e6fbbe7e7f63d0b87807153c661fb422a5b73f388795cab1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145 8352 bytes

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