Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0fee58181de62f…

MALICIOUS

PDF

69.7 KB Created: 2021-10-03 10:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6927f15a1e232f3289f0c8927877ae9b SHA-1: 516af0ded7817f22214296a860a36defcb09e851 SHA-256: 5e0fee58181de62ff1910e3497206120c51bb6b019f619043f39536cc93db99b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which appear to be part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://medvor.ru/uplcv?utm_term=64+lowrider+for+sale PDF link annotation
    • http://tacchigroup.com/public/thread/risorse/file/getovusimamaraxoxuzog.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/wamitizirudinuwirofipar.pdfIn PDF document text
    • http://www.seminariomenorvalencia.com/admin/lib/ckfinder/userfiles/files/20985827787.pdfIn PDF document text
    • https://armenia4d.com/contents/files/ropovejawegi.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/zaxarijunapimar.pdfIn PDF document text
    • http://umutisi.com/umut/upload/files/xotiruruzosiwinipizer.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/4a314175bbb0eb1d401797d9a2e598fe/tifubalawar.pdfIn PDF document text
    • http://protok.pro/upload/files/11112194218.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/vexiwotenexatu.pdfIn PDF document text
    • https://korankertas.com/contents/files/66449189908.pdfIn PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/wofubumabamojufigu.pdfIn PDF document text
    • https://anup.bo/images/files/kavujefimiziruzi.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/4220664163.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/52157410256.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/goliwavulopom.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/vedulitipiganer.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/92782552171.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/bomumubuxepani.pdfIn PDF document text
    • http://holzweiss.at/lixinidopododotobiwe.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/95622924966.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132cd98cb55b---xalejepoburi.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/20912469898.pdfIn PDF document text
    • https://southafricapools.com/contents/files/44766881296.pdfIn PDF document text
    • 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_off0000b247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB247 15512 bytes
SHA-256: 0b544ab653a20531fc2a757dd9881ebf93dfeb40ab76ad07f67afe5f75a7baf0
font_01_sfnt_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 10380 bytes
SHA-256: 0ddcf84ca9fad16703754abe04c9a4152d0a08feac72ca6cf4e4519af62876d5

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