Malicious PDF — malware analysis report

Static analysis result for SHA-256 03da72646c82eea7…

MALICIOUS

PDF

126.4 KB Created: 2021-06-30 09:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a601bc2465cddcb5edec66fcaf39a56 SHA-1: ed3224207e078f7e0e0d45ba2e69c6dead1ca274 SHA-256: 03da72646c82eea76abbf03b10410bd9597e00de97d414ee95ce4b37acc803f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms on disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

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=political+stance+meaning
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e72d832bf---5984150705.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/7188463dc9e0663cc0c20aaeb8e13228/turafuw.pdf
    • http://php-lounge.de/userfiles/file/fobinawesesafatagebe.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/b65af2d167e4ffe95c04d3559ac475ae/11288576029.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703d970a0e2---lotaxexokunejojefer.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096cafd98e02---kudipefaxo.pdf
    • https://dermatologie-chamonix.com/userfiles/file/pogomokaduwibi.pdf
    • https://kermanrooz.com/img/files/57827157146.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/38e61e26ac7508794cae930fa771263b/78193749527.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/1d02197b71e9a1d5b0f2d656694bcb78/mopol.pdf
    • https://bbpartner.cz/userfiles/file/23679239471.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/77d1c60e8c5e62e2687a60a8af3d7454/norisiwituk.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073bbf9e9edf---bipifebe.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/90164962508.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c4a398e45fd567d75c131f6962f9a457/86481456084.pdf
    • http://bhk-aindling.com/userfiles/files/57288677363.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/b402c4e3c3bd1526112fe6054577e50a/61506476792.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607270ecbd696---11601544328.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078cbd50ea30---98090173173.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/f3e441d12ac6b9029f68527353d3c938/xabozubodovubezipexaxuni.pdf
    • https://ljlconst.com/admin/images/file/sugokagowosatovedopedu.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ceda195aa---4444238727.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce68a97e961---60589377527.pdf
    • https://aspirans.com/files/file/xexopuvegeruxagenu.pdf
    • http://alpinedelhi.com/userfiles/files/59899659815.pdf
    • http://gorisum.net/fckeditor/upload_file/file/16479937392.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017176.bin
e6fc6a9c1281d25ac30be5f200f1fbd3e4a195ecd8c7dcb4fe3b57e9857c4972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17176 17756 bytes
font_01_sfnt_off00018cbc.bin
86483f2f93dc87dfce3d9974b13fa518d8c2dc39276d55fc63751d7e272992ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18CBC 10476 bytes
font_02_sfnt_off0001a483.bin
5b962d45127bdee1b19f7d91adbf0c101d7fb07808e384c0a5d83380d6416b1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A483 18076 bytes
font_03_sfnt_off0001d36c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D36C 16792 bytes

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