Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bfe666ae0a342a…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 02:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fc023fcad746484f5aeb6d21a2ea7c8 SHA-1: b42cbfd5a6a544a7490739dbd93fcc52ea8778fe SHA-256: 01bfe666ae0a342a5a1d32b454c6d25ce6b432cb94c584f6b9d08e2617f1b50e
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's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=all+the+snuggles
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b770bd96acc---4326638462.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/2f29cd0a457a46155141231882afad65/risijiwakaki.pdf
    • https://e-uchebnici.com/img/file/kofisoraveronas.pdf
    • http://www.drivingschool-brno.cz/files/files/78209410450.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f059a69051---tewivovoposomogobefekap.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1taettsoo66mfpf98no7a193e6/28745690824.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/86736f4deeec73d2fc3676c979bd48e0/79235714089.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f619a4bb9542756d86430c9714f05728/welazotolesoj.pdf
    • http://okzawidow.pl/img/upload/files/94190682073.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d84587640f---gokulogijaso.pdf
    • http://mastera-mix.ru/ckfinder/userfiles/files/futolexelafiperibesivakek.pdf
    • http://aarogyamedico.com/userfiles/file/97413454303.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4deb8d549---zoneketomiluxojozesakepa.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aab877bbbab---xufibelusozub.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c0af987625c7358fe993888373fb3ff3/gogodelijajimuxazopesa.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607396325ef32---11790492106.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b51c0c83e---67102087099.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be495685560---simobome.pdf
    • http://clairerolo.com/userfiles/file/76647447346.pdf
    • http://sl-light.ru/design/img/upload/file/28828336479.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3b5eaf0963472a574a523abde430ebc5/tegikibaxebij.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795eae33cb4---32405394287.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be6a0a24be7---3138358721.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608629b506e50---raxavuxopexil.pdf
    • https://gachbinhduong.com/upload/file/20456292965.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc0.bin
001a9c7b82e839d1b11a2a0c80819ecac0e0f1125c26f892a6f977fafb2e15b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 9992 bytes
font_01_sfnt_off000102db.bin
696132e69e0c9f291b00c149a30ee9e8cf1412b02a1d6114bd409e9c376d2a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 17840 bytes
font_02_sfnt_off00013054.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13054 16792 bytes

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