Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee900ce0f6f6d2b7…

MALICIOUS

PDF

72.5 KB Created: 2021-09-26 20:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 62ff9a6e1f9ed8dff0da15c7234b627b SHA-1: a01c23705d3877f8300b910d83681ab5f6ee3236 SHA-256: ee900ce0f6f6d2b7c9dbdfb906ab2dd87bb0de63dd97d8be74c3f752b1089baf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to disposable or compromised hosting. The ML classifier and ClamAV also identified it as malicious, likely a phishing or malware distribution lure. The embedded URLs suggest an attempt to redirect the user to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/fibabutijedipo.pdf In PDF document text
    • http://antichigelsi.it/userfiles/files/gadozolekonoxakoku.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bc4390c4e---86406587630.pdfIn PDF document text
    • https://campermagazine.tv/public/file/rikavaraj.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138f0cc64dbc---tuxasoxatinebagezopemalir.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109110703596703.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/31327158926.pdfIn PDF document text
    • https://100tmt.com/uploadimage/files/20210923060912.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134340c9c6ca---ziweginakopirejawugadito.pdfIn PDF document text
    • http://dakotaterritorydevelopment.com/ckfinder/userfiles/files/nozugejenudoki.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/fukolajujofe.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/97861766883.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/25985588906.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/winisaxegosujexipetemubu.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/jededijasaxunopalirubi.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/nopizupewodexamajewavozal.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/329ca1468b464ab30c32e178bfbe4ba7/pufanemunonagexowixevubod.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/jipapigizex.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/f3f0486b2c896f633230ebe25090f96d/25261777609.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/52547067866.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/rupusazitasop.pdfIn PDF document text
    • http://ned.ru/uploads/files/medokuvosusuwameketepov.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/kaseluxetuzuma.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/532a768da3ff0b3871f9eac57becb474/78243200852.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=talking+tom+apk+2PDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB641 18656 bytes
SHA-256: e485770545ebe4d87407511c979fe36b6f9b87bdbb8e0e4d67c386b04d5bdf23
font_01_sfnt_off0000e562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD79 10372 bytes
SHA-256: 2f77c82ad20e2e7fc5f628637fef52d4450827fa17cd1ae1eb68650cd3b59289

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