Malicious PDF — malware analysis report

Static analysis result for SHA-256 07231c426ffa5d1b…

MALICIOUS

PDF

64.7 KB Created: 2021-06-24 01:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e1cb924bf353b75f8d6edbe7f0b1c3dd SHA-1: b9e0e2cf9dbc0aada910ecfa3fe634d53e93a104 SHA-256: 07231c426ffa5d1bfe9516d86424a3b2ccee86511590445ff1ad07e43941d6a6
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The document contains a link farm pointing to various websites, some of which are hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and the nature of the hosting indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/81bf2f452b471a55a2871dfe155094cb/pujoluwiteleke.pdf In PDF document text
    • https://congchung7.com/upload/file/508253442.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/d52fef07d209af29cd65fba53a42522c/3461528762.pdfIn PDF document text
    • http://markone-tools.com/upload/files/30900399184.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac04d7c2561---74997308532.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/158a6eaa0c6756bd4db820047f1b28ee/76060977191.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/odqpbkuhe2g49ne1fjhtk9te67/lirojo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d911c05ee0---runexavusitifofasebit.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/woladexaguz.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6543cfa4c---85242405362.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/260a4f95b6b9af3fd936c4883fc1e40d/gisuw.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/23293412483.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/780336933.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a31058a0---35866749471.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844607dc531---lozixabe.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/namusinizodabisipugo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c7411fa6---40298790235.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/24287258221.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/puxapifidakuso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=telugu+movierulz+arjun+reddyPDF 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://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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE98 5204 bytes
SHA-256: 12c2e69a0954179ce9c0df6008985f46eb822ae6ea0f3382c08b7451a80b5084
font_01_sfnt_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 10860 bytes
SHA-256: a423c8913d551743f450bb7a675223c27d556ffb486a80157010779a5741a28f

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