Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e444901b76b2fd…

MALICIOUS

PDF

91.6 KB Created: 2021-06-26 01:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b6bd1f949386675d70fc4deac7d7df5 SHA-1: 4bdd0ec743108d90bb123ba19ced294c2c1caf2e SHA-256: e5e444901b76b2fdc0c09c83f2e1ee694f359eabb1104d47593bef4e5a50f740
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 designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fiob8t24suugi5p01v9jrc9pkm/milogifinawezi.pdf
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/95920620043.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/eb96660074df8575f825cd0b7c402e23/15391908850.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/327b53dd7a9ebf46a0c5996e9a085641/bufinanexugu.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a79cc0aeb0f---pimarakudipogofun.pdf
    • https://cafemocion.com/userfiles/file/bamosadelaw.pdf
    • http://bjaimama.com/data/upload/2021/06/file/202106260520289589.pdf
    • http://moderncarrent.com/user_img/files/vatozupibat.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf65a06f61e---vafexeve.pdf
    • http://matsonconstruction.net/userfiles/file/57500392759.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c285a86fe9---89205146731.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/a46db912ddadd2fa7e3f04d613b9fb1d/31019400651.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940b5038b47---gatobutivevezavifotoresij.pdf
    • https://vannordenvastgoed.nl/userfiles/file/jojirudoxurevepusune.pdf
    • http://kalkulacka-hypo.cz/userfiles/files/15913978179.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160913b09d1518---pekumikuzimojelubu.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcf4915668---wawomalerapixuxifet.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/4be9e705a8296318e63392fb2305f547/13045221676.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/002e1d7eb452b1494ba457fc01315757/17345577328.pdf
    • https://sieuviet.net/webroot/img/files/wivekapuvodu.pdf
    • https://ludifrance.fr/userfiles/file/65953650187.pdf
    • https://securitydm.com/slicice/file/ziranop.pdf
    • https://ltssinternational.com/res/wysiwyg/file/siwagonorotadorud.pdf
    • https://stratasphere.online/userfiles/file/timuzaporote.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+giver+chapter+20+questions+and+answers
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102cc.bin
26227993bd135cfb17084860a88b026e83bb858cc670fdea8073a82336421cdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 11352 bytes
font_01_sfnt_off00011d1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D1A 16792 bytes
font_02_sfnt_off0001352c.bin
caed5a88ed02886e0cd108f92a2b8fc059a0b999fb34b393b54252d0f78f841d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1352C 17012 bytes