Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05ef04a3ebeb4b1…

MALICIOUS

PDF

85.2 KB Created: 2021-07-02 08:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ac7c2df1d4b1391042241ef96dd40d8 SHA-1: c4d4a3c317f3af69bd9801beae39566124708757 SHA-256: d05ef04a3ebeb4b14f7a31351b2d7ec313c3cd45f03cf8b068526c737e04049b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports its role in a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071556b4c586---bejop.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c300906274---dumifitozowuwiv.pdf
    • https://combrooncom.com/contents//files/73370687454.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/2f4f484ad784b0774c14894b3b1d6cd5/manidepelowuvozapizet.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b650e5d1a2f---47958438442.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819ff439c8d---favofajogebanuwipofezam.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/37r6bh0nmtilfl7lketudh1fvg/91651547380.pdf
    • http://skolicka.eu/foto/images/file/retifenijaniwafuposa.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/vhjtd3iivvgd48dmmd59ajfhbl/18399237387.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160810d907ac7d---91842253563.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/gtk56laebam2a78kmip267gujs/30090318206.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec4c201c19---55799984228.pdf
    • https://lapalettedesarts.fr/gestion/file/matejifa.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f21c4a24c8---kawuk.pdf
    • http://growlink.biz/userfiles/file/18417849078.pdf
    • http://shukokai-voves.fr/userfiles/file/wabopula.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837031cdc92---14172234321.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd570cac42---lalatezidunaxiv.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/e261737032177b7df39bc7939580ae74/65225695025.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6658b4ddb28a39800713179ed04d0002/piwuv.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ms66ta8lgmmsdiehdcghf1b4u1/sulevawubazidokowadibezil.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/90c7f6dcb3dcaec11992e65f0bccfc54/mamimiwameligore.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608313881c9a3---warolifevexagoze.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/05c83a6b8833b186e4d0e50a218d6b82/1326600410.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fcb8a808---fozuvopanezivoga.pdf
    • https://ahha.az/userfiles/file/tijifoterixabe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=html5+game+free+download
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/e4b4ca36848863b0b98c52610954cb23/98886573308.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_off0000e6c5.bin
c9611e4c71b5449f3802399313abc7e1ae3eb46ceb75b14f6bdadae1d7d4e1ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 19124 bytes
font_01_sfnt_off00011703.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11703 16792 bytes
font_02_sfnt_off00012f1a.bin
944639e5ad5c7312ec16e088f396675b1ca57a689654271b9b240110b7abb2cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1A 10648 bytes

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