Malicious PDF — malware analysis report

Static analysis result for SHA-256 c491e9e7129f0d95…

MALICIOUS

PDF

136.9 KB Created: 2021-06-28 10:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 263effce21a66637d3f8b7ecea572bb4 SHA-1: 14a0a9d239c818ecc3b06ea945bd254a3afdb4e2 SHA-256: c491e9e7129f0d95fadf5add67b52cce77d203ee1f955cbc836b8e5285f313af
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and trojan delivery mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts social engineering to trick the user into installing a fake browser update or extension, a common tactic for credential theft or malware installation. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is part of a link farm designed to redirect users to malicious sites, potentially for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608538370e1b8---gitesibazej.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3f48c2aef---22648422895.pdf
    • http://sumterhigh89.com/clients/863574/File/56236210928.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rg088ldjmvu3li3fac906v64b5/34839820828.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/20fc338313adb830db43b4672e50ed93/kagubatigivemedojokuzod.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2b5e4803b---26901949127.pdf
    • http://rockoncharters.net/home/rock/public_html/ckfinder/userfiles/files/senaraguko.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/079871d1050b030d0bd072f5a88b7403/pepapodomapofajeso.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/c04c6d2d835086fef16074c01c546ea5/kivasix.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/52bd9fbfcf074a2dd7612cc9b5689dc8/60005606746.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608532a969930---85817773709.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6d3ca7b77---vanubojonogilewatumu.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89d250e430---jawonatowuzipef.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/bojuzokarebeka.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f7ed9c2d404c03abc5ca839ebe02bac6/90444047220.pdf
    • https://angkortaxiservice.com/userfiles/file/46137432555.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/97998b67423a9294639ec5706ff84c3e/molanibetolafitatakipo.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6dc50a3d---20609368674.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607238cb462d6---jokedi.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/e2c6165b44be124727bf51f4aaafa9a7/rupiz.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/ac7fd0c62df5e2d1c6cd42dc0973d635/51720513342.pdf
    • http://canvangdientu.com/images/file/dawenes.pdf
    • https://anthonygillant.com/userfiles/file/42532254914.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/luunpc3sdgg30c66pt1scf9nfi/74431702325.pdf
    • https://geneticapanama.com/userfiles/file/fekabovogeronobiwubibozaj.pdf
    • https://miaousland.fr/ckfinder/userfiles/files/23834523701.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=abstract+and+expressionism
    • 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_off0001b361.bin
e8c2f3c7d8a74c32f7c30ba0499c854e81c6174dc53e9d09ced6902894dc6bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B361 19180 bytes
font_01_sfnt_off0001e4ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4AD 16792 bytes
font_02_sfnt_off0001fcc4.bin
ea656d62d5c43de8cb9e987b0d899c4bf4e992b340bd82444cf6ded3d0926f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCC4 10852 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.