Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b1a5013add8e3b…

MALICIOUS

PDF

36.2 KB Authoring application: PDFBox
MD5: 22757d0b152a9c079883be390dddca26 SHA-1: b3224dddaf1645a8eaaa2edbef67e46d1c6c5df5 SHA-256: 22b1a5013add8e3b4a683a2674e4ab7ea97221eb143a0a6175f84aca60778065
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 URLs pointing to external PDF documents, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, suggesting a campaign to redirect users to potentially harmful content.

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://vegantogosxm.com/uploads/1/3/0/6/130604556/nivipufeva.pdf
    • http://carahuebner.com/uploads/1/3/0/4/130483804/fenowolojibaza-ruratugizomube.pdf
    • http://www.veracepizzanapoletana.ch/uploads/1/3/0/7/130739892/zofobebib.pdf
    • http://howiconnect.net/uploads/1/3/0/5/130540009/zipewot-jitofoxotu-worapokijefom.pdf
    • http://www.inspiretorespirefoundation.com/uploads/1/3/0/5/130588257/bemiruveg.pdf
    • http://webdisk.parkavenueparties.com/uploads/1/3/0/6/130621937/jefirugogot.pdf
    • http://eastlondontowing.co.uk/uploads/1/3/0/7/130776500/tebitax.pdf
    • http://liquorlawsvt.net/uploads/1/3/0/5/130544230/bcf941ff32.pdf
    • http://beltwayig.com/uploads/1/3/0/4/130435546/fubosoxujedugef.pdf
    • http://www.nadiaberyl.fr/uploads/1/3/0/6/130640208/mafoxazume.pdf
    • http://seedhybridchecker.com/uploads/1/3/0/6/130604658/davulotenixazigajax.pdf
    • http://incamamas.com/uploads/1/3/0/7/130740401/9124c.pdf
    • http://wrestlingmasksaustralia.com/uploads/1/3/0/5/130545800/4b53ab4f3e04af5.pdf
    • http://www.gemingzg.com/uploads/1/3/0/6/130639906/ruwuwep.pdf
    • http://cruisesloyalty.com/uploads/1/3/0/6/130620581/nopurumo.pdf
    • http://74-123-72-68.mgwnet.com/uploads/1/3/0/6/130639315/130639315.html#dangerous+goods+regulations+60th+edition+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003163.bin
4863928a38a488f8ed279110a79e313e011df5ef1ac416c93f0588298220b004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3163 8328 bytes

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