Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cc6261acf5e48d…

MALICIOUS

PDF

86.6 KB Created: 2021-08-26 11:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 047eb9293b6a6755b7b7ba7c38376f63 SHA-1: 6bda88a806f39176ad4c43c58ea4afa498d00840 SHA-256: d3cc6261acf5e48d6a44e78d4223c020c56bd0331d6faad1d91500c1a5a27147
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://garglob.ru/uplcv?utm_term=how+to+take+good+pictures+with+iphone+xr PDF link annotation
    • http://szguilong.com/userfiles/files/15486782704.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2683917b6---vesovaxosok.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/7op8bp7euqspgmb49nclisu7n0/belid.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/rarojunarifetonef.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ffc2dbc07399429a9d2a2cfb7e2825b8/sevijofuvonavanenavaleb.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086d8709e103---daxakusa.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/fukoz.pdfIn PDF document text
    • http://newtrierreunion1962.com/clients/6/64/64567561842b0bbd40b956adda0282a7/File/rejidadusatuduj.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/takiviwuvikuzeset.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/86988521600.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e3c8ea7e7---41902451518.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/63087309544.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/vibujagabekepad.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/1f277d8073144e5fdd1d5ca0fdd5c078/zalowubenemugawoga.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/febabagoreloxepijuwodude.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/1561460709.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/dixoxixaxobuzazowigoru.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/gulusimazososovar.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/kapejekugarinosefar.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161155e2e11de9---nadagenimije.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609644d13334a---53227099951.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aebd62de9a---repotubadige.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160778ee326e20---gajofideguloj.pdfIn PDF document text
    • 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_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 17036 bytes
SHA-256: 4d213a20f78b98a4d26c098ba90bdee56ac226744d95bb7cb4b6d72f91820d46
font_01_sfnt_off00011863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11863 11120 bytes
SHA-256: 2939f8a62e76d0583d2358bb744994ff9546acbec9b7b3db88fadb305e617dc1
font_02_sfnt_off00013225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1