Malicious PDF — malware analysis report

Static analysis result for SHA-256 22830fc87462a124…

MALICIOUS

PDF

34.5 KB Authoring application: Karbon
MD5: b5e11aa6a69cb23184f3d023d76e8c80 SHA-1: 70ad2a5d71e416570a96201ef0a32c0e3b687344 SHA-256: 22830fc87462a12418678994bf614a8e74dd3346f3efc5c4d0f2deb4fcf44b66
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to other PDF files, indicating a link farm designed to drive traffic. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent. The document body, despite being heavily obfuscated, contains references to phonics books, likely a lure to encourage downloads of the linked malicious PDFs.

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://www.maxandthestar.co.uk/uploads/1/3/0/5/130588762/lukipokagirim-fumemu.pdf
    • http://aimhealthgta.com/uploads/1/3/0/7/130739247/pipaxobakegu_bobilud_janutokusadet_mugalaja.pdf
    • http://www.designateddeliveries.com/uploads/1/3/0/4/130435577/607501499a2.pdf
    • http://fincacatalina.com/uploads/1/3/0/7/130740092/6331005.pdf
    • http://kevinmellobook.com/uploads/1/3/0/5/130588246/1ce1f952e534b.pdf
    • http://mjclifestyle.com/uploads/1/3/0/7/130740123/2ca3a4f0682a24.pdf
    • http://leoeandhyde.com/uploads/1/3/0/7/130739416/wixiperesam.pdf
    • http://www.studyaston.com/uploads/1/3/0/6/130639632/wumorarefimov-bojedivode-tuzuxo.pdf
    • http://questswim.com/uploads/1/3/0/6/130621596/zekologar_govovonorin_dewubuvowep.pdf
    • http://zoyamoda.com/uploads/1/3/0/7/130740202/885f02.pdf
    • http://hostmaster.theenemyband.com/uploads/1/3/0/6/130639347/54a7b660e46488.pdf
    • http://kreativekups.com/uploads/1/3/0/6/130620750/8553893.pdf
    • http://www.elegantcreations.net/uploads/1/3/0/4/130476541/130476541.html#free+phonics+books+for+kindergarten+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ce4.bin
b91acfdbb9030d700cfbf45eeca4cff46022418e7c41a960262ed94af0d8cde5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE4 8476 bytes

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