Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcdc63dc6f3af4a…

MALICIOUS

PDF

51.1 KB Authoring application: Mobipocket Creator
MD5: d2ed80f5cb71176851fe632649281c10 SHA-1: b01dadcb5dc7e9436448ce757bf84951aef92072 SHA-256: 7bcdc63dc6f3af4a1a1512634c470d33dc45ce60df334fb5347b7e856cf877dd
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the sheer volume of external links suggests a coordinated effort to redirect users to potentially harmful sites.

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://hostmaster.ayamcemani.co.uk/uploads/1/3/0/5/130539188/434986.pdf
    • http://trueiconic.net/uploads/1/3/0/3/130380037/b30c65.pdf
    • http://www.protocelantioxidant.com/uploads/1/3/0/7/130740550/1001788.pdf
    • http://oddher.com/uploads/1/3/0/6/130604807/kefix-labuwibesilef-zatujekon.pdf
    • http://buildingonbookspodcast.com/uploads/1/3/0/2/130272348/65dda6025a.pdf
    • http://myonebighappyphotography.com/uploads/1/3/0/7/130776508/6696431.pdf
    • http://bobcatspanish.com/uploads/1/3/0/2/130272585/364568.pdf
    • http://magnificentweedseeds.ca/uploads/1/3/0/5/130588931/6373276.pdf
    • http://rivertownsultimate.com/uploads/1/3/0/7/130739121/4735273.pdf
    • http://nomadicwellness.com/uploads/1/3/0/7/130739615/7314919.pdf
    • http://mail.centralfreemethodist.com/uploads/1/3/0/6/130620763/kofazoj.pdf
    • http://the-good-life.ca/uploads/1/3/0/2/130288359/706900.pdf
    • http://mygirlsevents.com/uploads/1/3/0/7/130738894/6792348.pdf
    • http://mg.public-montessori.fr/uploads/1/3/0/6/130605497/mozalepez_pavuzirin.pdf
    • http://sewakholding.com/uploads/1/3/0/8/130814066/7055585.pdf
    • http://nylsremodelingcorp.net/uploads/1/3/0/7/130776804/4487178.pdf
    • http://eliteimagesplus.com/uploads/1/3/0/5/130590153/45fbc.pdf
    • http://tailormadeventures.com/uploads/1/3/0/2/130289308/jupimorewolu.pdf
    • http://funandsun.org/uploads/1/3/0/6/130639768/3325a0886.pdf
    • http://graymatter8.info/uploads/1/3/0/2/130272516/tuluj.pdf
    • http://sisstar289.com/uploads/1/3/0/5/130589401/zonixolenorupobox.pdf
    • http://shalongguojiclubsxianjinwang.br3h.com/uploads/1/3/0/6/130604004/130604004.html#rivers+in+india+map+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ab.bin
2417937907342ff47d9b04e74d574b62e6bc93f4b3a1736498ed53c53192bed0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50AB 7540 bytes
font_01_sfnt_off0000672e.bin
f939567846b6925a11dd73cbee1c25444d42c54155ca15766ca4bd41b4cb384a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672E 8480 bytes

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