Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a72675ef3c0d01…

MALICIOUS

PDF

88.8 KB Created: 2021-07-22 22:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ee06fc26c7a9ca56b0c6e56efaeba560 SHA-1: e22978dbde1d4305c058b9c2719b6e9ab9d06f69 SHA-256: c8a72675ef3c0d014473e7ede5fa7a8914613c44cd2baecb40b9470bbdf84713
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 and disposable domains, a common tactic for hosting phishing pages or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm suggests it's designed to lure users to external malicious content.

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://hrmconsulting.biz/upload/files/56154804671.pdf In PDF document text
    • https://kovosluzba-praha.cz/res/file/64980427522.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/m4l448vg1urq0s90nva993c31f/14615265379.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160baad7da50cb---29181631579.pdfIn PDF document text
    • https://filetorme.com/upload/files/91679205951.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d07dd403f7367c885085da9c7527a8f3/22244956317.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/kirixowidisofagotagirugu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a9491171aee---14764900029.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e41ade417a---mamidivomosejepib.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7889b4a856---82883126924.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/jj8bink94kt6sef8gqchbhir3t/27827849580.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16097fea9c4698---ponusurutidoger.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609649cd2e174---2705142791.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/34140689101.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/bps1bj1kd6ulhko23imfmd804f/moxavedusimipab.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609890962815f---beviropazanefiwe.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7a2010c6---77245620920.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/napuxobiwig.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/osuaf0skqi7jqkvi19ocjo3b86/94838582543.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/junaravipixatejepokotev.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/93409650947.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/begin.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/hkgquooglrrl9k51k8ri5t0l0i/58398818809.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/94552818921.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/95713630077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=best+group+in+telegram+to+download+hollywood+moviesPDF link annotation
    • 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://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_off0000f842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 11256 bytes
SHA-256: f880ca3c4d22199b8b29516d5bc4bc730c9117ccb366787f33636d2b986d25a7
font_01_sfnt_off0001125e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125E 17296 bytes
SHA-256: c39b7738408e65969be8ff0e1b772e31d117b78d210eb67f44f111902629c70a
font_02_sfnt_off00013f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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