Malicious PDF — malware analysis report

Static analysis result for SHA-256 55a2d8f0a828bb23…

MALICIOUS

PDF

44.8 KB Authoring application: Karbon
MD5: ed07a973ae39624504ab66c349c54716 SHA-1: 27d2a00637147c6a08b900f2f5b979feef3f7205 SHA-256: 55a2d8f0a828bb23e5cf6824a338cb3e6dc04e25de9da63bfbb3f57a914f1655
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though partially corrupted, contains references to 'basic electronics pdf' and a platform for content creation, potentially serving as a lure. The primary attack pattern observed is the creation of a link farm to distribute or mask malicious activity.

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://lechenienarkomanii-kostroma.ru/uploads/2020/01/27/vapaxusezimetex-pawubagufe-gagewese.pdf
    • http://nounoucergy95.com/uploads/1/3/0/5/130550800/zalebivisevaxipim.pdf
    • http://tastinggame.eu/uploads/1/3/0/6/130639689/59cd6e.pdf
    • http://bestflooringco.com/uploads/1/3/0/6/130605182/1907670.pdf
    • http://alaskaandhacheries.com/uploads/1/3/0/5/130551585/sutenagujuse.pdf
    • http://njfamilyphotography.com/uploads/1/3/0/4/130483924/kafomo_bolopasixozader_xunibava.pdf
    • http://panoramicgalaxy.com/uploads/1/3/0/6/130621771/240455.pdf
    • http://baijingbox.com/uploads/1/3/0/6/130605324/xevawakebe-vesebilibeseraw-tobodolefosak-vanawej.pdf
    • http://zodizup.andrusha.xyz/uploads/2020/01/27/lisodo_tosut_wubij.pdf
    • http://nidinidi.com/uploads/1/3/0/4/130483409/guruximaj.pdf
    • http://moversinmiami.net/uploads/1/3/0/2/130273982/49e394d8.pdf
    • http://becomingwholeclt.com/uploads/1/3/0/2/130292098/5805698.pdf
    • http://synodcanada.com/uploads/1/3/0/4/130488165/bitine.pdf
    • http://lebosscodance.com/uploads/1/3/0/5/130545666/ruwefo.pdf
    • http://tell-to.ru/uploads/2020/01/28/bae828136.pdf
    • http://aurin.be/uploads/1/3/0/6/130621548/ruritifep.pdf
    • http://peru.tiu.fun/uploads/2020/01/28/3206689.pdf
    • http://anteroproducts.com/uploads/1/3/0/3/130379307/mulunotaxexaw.pdf
    • http://betterwithcontxt.com/uploads/1/3/0/5/130543264/lakixamesof.pdf
    • http://mychinesewatch.com/uploads/1/3/0/2/130291441/130291441.html#bl+theraja+basic+electronics+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000159a.bin
95d7aac4a7c5fb0ee919b0fa0663a8e5c9fee5cecbab1a8bb81cf8e383a65d1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159A 8720 bytes
font_01_sfnt_off000067bc.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 16204 bytes

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