Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd68d0cffa98f8b…

MALICIOUS

PDF

88.4 KB Created: 2021-07-04 20:36:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e332fa97b9203232365f076569f378c6 SHA-1: 1bf47933112d052aef82e6ff5f1024f47a035f6b SHA-256: 7dd68d0cffa98f8b44e5c0de8a415fec9c32e40042f8b08e72f3a2bd3b8b0b5a
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack pattern. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a dropper for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://africa-emergence2019.com/userfiles/file/97162511364.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e101f131f0---bogasose.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/2d1fbf917a22e9df55ded03b9356ca13/5991767222.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/a5tjtjcnts46heeqne3596lbqr/71984156012.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d0510ba9294---fedusapokozimafonenox.pdf
    • http://teenaramainc.org/clients/875997/File/ramixo.pdf
    • https://ksuskalology.com/images/file/21445055004.pdf
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/13350695424.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098cdc457ae4---nagipanupepumesoseba.pdf
    • https://mobilieroccasion.fr/uploads/file/kodokisurasafibemovinuk.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b46bea4ede9---xadopaxoxi.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/morilevutimobid.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/shb9gocbopbkjp6jkk5chjo72n/ruzexetubuzi.pdf
    • http://chinajnbt.com/images/upload/File/5697504763.pdf
    • http://antonioruizabogados.es/userfiles/file/68303113521.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16074484335d51---kufalo.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16078038eb61a7---3899959448.pdf
    • http://triatlonbizuterie.cz/sites/default/files/file/50998408438.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d086a362d090af91fa68c07e126e7c6d/25975582604.pdf
    • http://nissanotogovap.com/uploads/images/files/30782099515.pdf
    • http://kapelski.pl/userfiles/file/24722777025.pdf
    • http://drkoopman.nl/cmsimages/file/63470633686.pdf
    • https://noriupapildu.lt/ckfinder/userfiles/files/wajupiz.pdf
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/51724081468.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/4481f94a3c00fa2cf982b88d20f6c505/62861382150.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abc42de5189---78079539204.pdf
    • https://spacemov9.com/top-box-office-movies-watch/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=despicable+me+3+torrent+magnet
    • 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_off0000f262.bin
51c161a6bd797b3907d07d9ada1c7fb919df5b5ae2015b65e9cb2cba92014a41
pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 11032 bytes
font_01_sfnt_off00010bd8.bin
28c3f7b43ab1728f51313cd579fb46e81a7b6305fb2621f851dbcdff56673139
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD8 17856 bytes
font_02_sfnt_off00013ab4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB4 16792 bytes