Malicious PDF — malware analysis report

Static analysis result for SHA-256 80eda8f96dd2b13a…

MALICIOUS

PDF

69.4 KB Created: 2021-10-02 13:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 37b85f64cb8a5272950c26ce37f9d2f1 SHA-1: 84d3d2c71ac7fd1fde853a7702a7d3448a80e638 SHA-256: 80eda8f96dd2b13ab21545540b7d47ec8112a7048de499e297b14e8aba260f1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves directing users to these external URLs, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://drafthe.ru/uplcv?utm_term=god+commands+every+man+to+repent PDF link annotation
    • http://icbiz.ru/userfiles/file/24553338803.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/93616872376.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/22ae862cf39b4789d41ccf5ddd221cbe/6437582774.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b4934bafc6---jegeruta.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/45850070780.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sunawutut.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/37598095197.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/58271415271.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/97544764690.pdfIn PDF document text
    • https://breedlife.com/upload/files/49445582305.pdfIn PDF document text
    • https://laundrybyconrads.com/nbloom/fckuploads/file/41725882076.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/99829638069.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/c79ee96a78cfdfbc58250be809bdee01/58559696824.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/faraxuro.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/57796460351.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/nulowe.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/48307194680.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/91603327944.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/70475462075.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/losekujabixi.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/jutapadajasivobuve.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd6f958ea5---71680502109.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/54629611123.pdfIn PDF document text
    • https://sharedsynergy.com/userfiles/file/karitixij.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/zesadopub.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_off0000b0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B8 15144 bytes
SHA-256: 9281783160d896caa002f4774152694f5bcccde0a30b92ff291abba46f313429
font_02_sfnt_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 10756 bytes
SHA-256: bf46277cc6dbb91496318ac4bcb663e1cf6f514f6a983bf64b0e8c21323a5110

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