Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d42752ce0b43fe…

MALICIOUS

PDF

70.0 KB Created: 2021-09-05 22:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f576ccc201e4dd98dc66d984bd3970ab SHA-1: de212bc6923836aaef7e31ab94ff820c189f3363 SHA-256: e6d42752ce0b43fe6d89ff4f9b7153d56885e4f9bddbb99bcc6bb0036de9ece6
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or exploit kits. The presence of external URIs and link farms points towards a phishing or credential harvesting attempt.

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://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/971a5a5b33ee9ac4ae41006b15cc19c0/wijuvifusamavu.pdf In PDF document text
    • http://hnc2.com/userfiles/file/rilodami.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/4676d49fab5a2ac2c4044aec6663c35a/9557601157.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/42236257954.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/mizafuv.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace928f3bdd---40797306923.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/6c121fcdd69597d2877125eb75c084b7/nezob.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/digokibowewejomugalomuge.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/7c2545d0c170b48672d8b958c1c37f17/78097553829.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/viguze.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/24dg68jrbo88urol7aku59442r/bapodulu.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/gasodonezezuwirulawupodu.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/aecf4e1852887a437ded2b79cebdd558/60361651964.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c0001fe08c08f2a8846a17aeb6b21619/kidisokoteresar.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e18f00e52---58424417137.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/cd32aefce83b4a6cf54855c045aaff4a/gamibamawovorure.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/27846178155.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/zemebezep.pdfIn PDF document text
    • https://gangnampools.com/contents//files/lulafefobuwil.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/13325981877.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/15767522794.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/zomeserigokapeguzutefi.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/2f4e43c3abf4ed0d5259d89e8bb034b5/dapofowowasasiz.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/wemekedovod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=all+star+batman+%26+robin+the+boy+wonder+pdfPDF 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_off0000b56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 15416 bytes
SHA-256: 55570a9626209cf3758600142ec98ce96855d44ae24f9f2a88879bc3f53484d8
font_02_sfnt_off0000f48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48B 10044 bytes
SHA-256: 2058b89d896ce9e9ab62657340b168e613d950937c172a06e4661a60af857c4a