Malicious PDF — malware analysis report

Static analysis result for SHA-256 bede4126f3f48f66…

MALICIOUS

PDF

88.7 KB Created: 2021-09-02 20:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f93b6e72ee29034d6cd1d3a2d9535d7e SHA-1: 35c4fd710db6d6340af9f9c8cdc8d66ba96b69b7 SHA-256: bede4126f3f48f6658ae14d5ea8da7e675a6f9372029c2bcb8d428cef23b28ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to compromised WordPress sites, many of which are configured to host PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and the presence of 'utm_term' parameters suggests a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware disguised as legitimate documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://drafthe.ru/uplcv?utm_term=basic+english+grammar+in+urdu+pdf+free+download PDF link annotation
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16103966adac3a---memezix.pdfIn PDF document text
    • http://wirheiraten.de/images/file/dozojuxunibikodum.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160819340c86e1---latox.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/goxoxabujuvazimok.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/9bac5f6d48639fcc319bed31fe30e5e8/tovatazegidedikoxuluri.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4973ce8a---88805106799.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/naruvojebepepuz.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/vnkbj280bj114b2gsrbrlsu803/puxagu.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a09bf11ec7---64836644367.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/c070f1efe1348f314abb12da0378b278/56619396590.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/bereg.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/62030906933.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/123bdd7681bc215d1cbcb5b7df2e3a18/lizerujor.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/zidinodisiko.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/zevofewitatoxotawopebed.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/sojewipemumamimatoxiju.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/sinaxenalatifikabofor.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/9mcpor97usg4l34tcd5c2g5mo3/lirekimowowipasiruxiba.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/35061812592.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/dujagefupisum.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/021c21eed3334879224e2e6cca4e10c2/15398002993.pdfIn PDF document text
    • 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_off0000f27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27A 18476 bytes
SHA-256: 7bbc942a562fd9c89386816194044fa691d72c62a73be71cffaa996a7eb50d0d
font_01_sfnt_off00012265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12265 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7C 11208 bytes
SHA-256: ab9bd72f48601c145777e7c376735496ba6a61a7652c5fea463b6ce233be2d95

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