Malicious PDF — malware analysis report

Static analysis result for SHA-256 beaf8b793961ee60…

MALICIOUS

PDF

71.9 KB Created: 2021-09-25 03:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c5eebc414314e7c040a468aacba3a1d SHA-1: 7fe497186855ce42ab3013292e843efd1fe77bde SHA-256: beaf8b793961ee6094c493dcc35714b0f6ac527d610ad254c0f1d9f22e1f3e3d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://drafthe.ru/uplcv?utm_term=how+to+get+free+chamet+coins PDF link annotation
    • https://avflash.nl/upload/files/vaposufuni.pdfIn PDF document text
    • https://ntc-container.com/upload/files/tusebut.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/8052eb2d8d2b9efdb3a898f38f5b8921/tijudapokeparinigibojisa.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/3913974024.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/murujugoworedefikot.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/nadusefawijegebe.pdfIn PDF document text
    • http://zenithmetals.com/files/26107208433.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/laximomofidodutojivafowiw.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/tawitafo.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/buwuxadefugewu.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/87585265241.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/84068538402.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/4287606905.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/bikaxolorevonimopubesu.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/numizudibirokivinulabigow.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/vcbao8mg8852kd57avd5li93o1/50456084808.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/99032172604.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/gajosexoxafowonuxu.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/83932156388.pdfIn PDF document text
    • http://xn----0tbbbfo0f.xn--p1ai/userfiles/file/35581066235.pdfIn PDF document text
    • http://podarox.ru/public/files/pozigowimobedekesibuk.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/91811214524.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_off0000b3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFF 17536 bytes
SHA-256: 41664c8d7dc6c24ca32dbfd4c1ed29cff06b51db56d7e46a3c179ec4104593cc
font_02_sfnt_off0000f8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F7 10812 bytes
SHA-256: daf796ea791132ccab5f33ba0a137dcbdd8e4853d21dbb5e1705a02ace233bfe

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