Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9dbf4a4d538588…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 22:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04f132d5e8e8a58900b8578d7e299658 SHA-1: 7dd50822c1b8c759c7ffd527fd85b35640b577dc SHA-256: 2c9dbf4a4d5385882ec9ff936504fdff190712ec93fc50c8c875d8139231920d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates it's designed to look like an image, hiding clickable elements that likely lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://villabrown.it/userfiles/files/314227484.pdf In PDF document text
    • http://twfindia.in/userfiles/files/64833821826.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ehl05d59pdjat8cp8gsrub6kom/jowulunozor.pdfIn PDF document text
    • http://saraiaser.nl/userfiles/file/jitewira.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/botutaxajebaxotuzesawa.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/55324991566.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210909_A7903AD33A9C8330.pdfIn PDF document text
    • https://tch.lu/files/files/9556789404.pdfIn PDF document text
    • https://demideopool.ro/ckfinder/userfiles/files/98899176019.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/nowexiwetibowez.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/wojokowotad.pdfIn PDF document text
    • https://dacola.com/upload/files/xokizowutibefarezawu.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/gibejefodekuvik.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/fojifonedidelenugosukanik.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16142835526de0---futovedukebisepogawe.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/mevodekevupawik.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/67350253563.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/xupuvudipov.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/tojisufofere.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140d0eaed4b6---10466028917.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/fixizanirogapuk.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/48300906861.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/55849047327.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/jesaf.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/52853824543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=access+mobile+bookmarks+in+chromePDF 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://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_off0000b3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC11 14016 bytes
SHA-256: dfa0aab0e4ec481f2d830bbd1886a3f25ccdd3a113a8418b796628d32c262cd5
font_02_sfnt_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 10612 bytes
SHA-256: 32fe9c20c0dc6a828a38cbf3ec5ba38a9f58ff876ba8c8cf87fb18711117ac7f

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