Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9d684ddc7ac6db…

MALICIOUS

PDF

86.5 KB Created: 2021-08-07 00:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3eda073cddf154dbcbf55b8b2b5d49aa SHA-1: 2af9a746a80805b5e759a000b047eabb2a23f30f SHA-256: 8e9d684ddc7ac6db5be32cbc8fbbf7551d7d9036835c491f6bba38071b860ee5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm with numerous URLs, some of which point to compromised CMS uploads, suggesting an attempt to redirect users to malicious content or downloads. The presence of 'utm_term=download game gta 5 beta android no verification' in one URL indicates a lure for a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://coebmsf.com/userfiles/file/vesimiziwelepurarexo.pdf In PDF document text
    • https://icon-studios.com/userfiles/file/kujubaferavamof.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/93613069127.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/rasalotonajufu.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/122drujc1gkc988jd5vtdc9g58/93149526721.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/nobilumor.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877b51dbcfe---11545345126.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/lutum.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/mebumodil.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a73c11bf5---zojerulagosojutuwa.pdfIn PDF document text
    • https://latework.cz/soubory/dilode.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/foxufadategefasinam.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/80e3fbc843f7dc28798daefb54104efe/79027555957.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/87020033711.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/77997558201.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aae86caf618---lupofanesukuregu.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/596b069a710c62efab8c5066a906b4bf/14427511403.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/zasal.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202107061411288253.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160870b5c1db77---mezogus.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/6a6415a92de69960c2a6b489a7fd8076/30316233737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+game+gta+5+beta+android+no+verificationPDF 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_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 11080 bytes
SHA-256: f09adc26e6483860debd91bed024b613f062ce3fa399b56f3c9ad44377f66754
font_02_sfnt_off00011f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F10 17168 bytes
SHA-256: f69709ddd1c1e2b1e35b48f76c1f956af8e790c8906d0c5d690c87fcda4b9231

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