Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb6ea530d559460…

MALICIOUS

PDF

78.8 KB Authoring application: Karbon
MD5: 20f5b6e969192e997b8a4e7108e9c8a4 SHA-1: 7b33dc6954cb88339a6a5534599b0fa97e5f2258 SHA-256: 3bb6ea530d55946019e7df364808f73de402a7c3277dd6f2d6ec99abffcc903a
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 links to external PDF documents hosted on various domains. This behavior is indicative of a link farm or redirection scheme, likely intended to lead users to malicious content or phishing pages. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic-driving 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://apslabgroup.com/uploads/1/3/0/5/130551696/refunujugakizogaxi.pdf
    • http://bodymindandsport.club/uploads/1/3/0/5/130588567/lenodoxozu.pdf
    • https://tadixuvoluta.weebly.com/uploads/1/3/0/4/130476410/vudixoxob.pdf
    • http://fapapina.skazkashow.ru/uploads/2020/01/28/145285.pdf
    • http://associationsdesservants.fr/uploads/1/3/0/5/130539270/1272701.pdf
    • http://olaarte.com/uploads/1/3/0/2/130274330/5067441.pdf
    • http://sarahdguerra.com/uploads/1/3/0/5/130588858/3b82edd48753.pdf
    • http://easycompmx.com/uploads/1/3/0/6/130604855/bawixagimopi.pdf
    • http://mrbugfix.com/uploads/1/3/0/6/130604226/4688035.pdf
    • http://bamshotgun.com/uploads/1/3/0/5/130590123/besupitoko-budane-kubomadejo.pdf
    • http://dotox.cleobury.online/uploads/2020/01/28/1436713.pdf
    • http://shardexplorers.com/uploads/1/3/0/6/130621472/130621472.html#neutropenic+fever+guideline

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000150b.bin
b8174d3a9f3cc4ff0975e1eca3b33798e108b3308bec6b379d85baf348f00c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x150B 9104 bytes
font_01_sfnt_off0000fbbb.bin
b0a6a33381002d1c379ca931d660fe98df7a73518421c8b234b9dc16af60e95a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 2696 bytes

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