Malicious PDF — malware analysis report

Static analysis result for SHA-256 6483db3ef3b85d53…

MALICIOUS

PDF

63.7 KB Created: 2021-09-17 09:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9c688ccfbda1b9bdd6e024faf4e34575 SHA-1: 3d322bad60428d6f6bba0f198bded71c09286d1a SHA-256: 6483db3ef3b85d53ed07f9ae5082e960c447b98d90a8427f9cd5caaf752f764b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. ClamAV detection confirms its malicious nature. The embedded URLs and the heuristic indicating a link farm suggest the primary goal is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

Heuristics 4

  • 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
  • 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://irlanc.ru/uplcv?utm_term=gta+sa+free+download+android PDF link annotation
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/napibanenedite.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/viwoguvukeruweralimaveb.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/tadudugen.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/fosifosumuxodisufunelivif.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/23806800132.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/foxixe.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/13254506395.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210910_0FC943C228ABC28A.pdfIn PDF document text
    • http://xsteelstock.com/d/files/1036870917.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/20610433417.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/83980653486.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/galafetukigiburujavi.pdfIn PDF document text
    • http://mcutech.net/files/nijemirulemetib.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/suzusewinetizefigepanuxo.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/47075736911.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/29273424492.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16130853be135f---77669986.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/86030673237.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/gebawutidafozas.pdfIn PDF document text
    • http://newo.ru/files/files/79684151380.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/zolusadurogowozaju.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382abb8bfb3---68920787511.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/samurum.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38A 10472 bytes
SHA-256: f7cb2f7f92a978df20620e8b2599d6f80d78be00f0d280990875b611eec048e4
font_01_sfnt_off0000cb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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