Malicious PDF — malware analysis report

Static analysis result for SHA-256 742307b114792911…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 15:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 96e7a78559a851d1fd2faa7f49508bc4 SHA-1: 32428d87d96c479046db0e4045fa6bf7203cbf31 SHA-256: 742307b114792911b438fc411651de783e92a17ad9e37bca44fbaa3b88887be2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on suspicious domains and flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://engroupe.ca/aym_image/files/36246621731.pdf In PDF document text
    • https://imihwa.com/uploads/image/20210902/files/20210902215107.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/jureniz.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/11439353558.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7305d595b---27765226651.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/rudebitajekuzimewoxirezu.pdfIn PDF document text
    • http://winso.tw/userfiles/file/rumugebonowabigerumererel.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/nadasosoxapixuren.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/744297692015cbed44439e9176bafe9e/30523285180.pdfIn PDF document text
    • https://volandovia.it/public/fileeditor/file/11332541910.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/40968693869.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/tedilelulifizoma.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/puzutalofi.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/rofij.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210909072752_075nil.pdfIn PDF document text
    • https://mimpishio2.net/contents/files/26230778911.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/gabirisupojigi.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/42909533984.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/kubapavamefoxusakuxagew.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/dakuzolupib.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210902_EECA502D4045BC7D.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/mapitazinuwosugumibumati.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=free+backup+software+for+android+phone+to+pcPDF 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_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0A 11068 bytes
SHA-256: cb463bead65eaa7f0765f5ca51e69e71f3d1c561df72ed1c6e5867c09f6ee685
font_02_sfnt_off00011398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 17876 bytes
SHA-256: 8e8fa5a7a81ea0cbfa3165735cf582eec4c899b78950acbf0e0bf18bb8d90f40