Malicious PDF — malware analysis report

Static analysis result for SHA-256 299eb21728d43e29…

MALICIOUS

PDF

180.3 KB Created: 2021-07-08 08:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d20ba8bed44a7b691f8c96a21cb9cdb5 SHA-1: afe582e7d4fc3f31be83966249b3c9d28e9fcf1c SHA-256: 299eb21728d43e298df298f66fa43eec65e45aeed315a442b5ba835bea593de2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://inwebjor.ru/uplcv?utm_term=analyze+an+issue+gre+examples PDF link annotation
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57e8e8ba58---kimebibirukinazototoz.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcf2312e9a---84784789416.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/df2e9fc4d040d41ae33e549689e29bf0/kanefefeme.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081680aa70f5---71948316542.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/zajunebudo.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160931558c0e4c---93199706429.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5df999663b783f6ff4374242fdcd975f/72587081367.pdfIn PDF document text
    • http://benetalent.com/upload/files/nolesupavute.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16088cf5728ca0---21567191808.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/biragokovizizosoto.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3265a8dbb6c048e19926cd45dd173f75/63994976063.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7a7de3a8e---33038785678.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c9783dd0efb---rutiwimuzepikanuxo.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2cecdab266a902a421a92906241734af/61478972929.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/femaberawuxapujimuji.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/98572a58769ffa6bfc92693c68dfcf7c/mutonibebuluxamitusefi.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078b395801d8---90909183103.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b18a4ab364a7edbc11eddabcd0821726/lelijofaxaredun.pdfIn PDF document text
    • https://clinicscrm.com/img/files/64717674639.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/jatagerorejabi.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/zufufubajuzuvu.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/riwiz.pdfIn PDF document text
    • http://archimax.ch/dynamic-images/cms/file/46327238711.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_off00026411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26411 17984 bytes
SHA-256: 2a860864b11d4dc592b37a3a0abec731286a7b9607c94bb6b5f1780b6f425b58
font_01_sfnt_off0002930b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2930B 10732 bytes
SHA-256: f5b0926f8d3d3ce9699a08526e33f441ca31e4359d71492eae66afafd99a9f6f
font_02_sfnt_off0002abc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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