Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d926048e347821e…

MALICIOUS

PDF

66.0 KB Created: 2021-09-25 03:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c2af65763e8f570e84fafbbdac91cac0 SHA-1: 85a1c0cb9564e370912e616ec1c84f942483f0b1 SHA-256: 0d926048e347821e3d9a06863cd57a8e4d708a2983b30e746a10e115203ac26c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and ML classifiers. It contains numerous external URIs, with a high concentration on disposable hosting, indicating a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. The primary external URI observed is 'https://drafthe.ru/uplcv?utm_term=install+ipogo+ios', suggesting a potential phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

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://drafthe.ru/uplcv?utm_term=install+ipogo+ios
    • http://www.leposeur.fr/site/upload/ckfinder/files/40527350441.pdf
    • https://ski-valloire.com/ckfinder/userfiles/files/muwuzapebuxuradita.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fa107c0b07f953285ada8876d468a780/kunatizadafolawige.pdf
    • http://tamtamphat.com/upload/files/28615802374.pdf
    • http://the100voicesofgospel.de/fichiers/newsletter/file/xaxuwa.pdf
    • http://intertexmedical.com/userfiles/files/16349414351.pdf
    • http://tz5168.com/uploadfile/image/2021/09/02/file/20210902_093334_189.pdf
    • http://internet-trade.eu/UserFiles/file/74612303317.pdf
    • https://youkuvpn.com/upload/files/norudifilekele.pdf
    • http://ip-golubev.ru/ckfinder/userfiles/files/49911727592.pdf
    • http://baiduvpn.com/upload/files/33966450971.pdf
    • http://singer-island-condos.com/userfiles/files/wepitipibi.pdf
    • https://sayurmateng.com/contents/files/53844315170.pdf
    • http://presssimayeshahr.ir/pic/file/runez.pdf
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210907040455.pdf
    • https://gilbertems.com/videos/file/rigemalaludezevelutalurog.pdf
    • https://psfund.org/public/uploads/files/cms_files/31514886805.pdf
    • https://garraldaarquitectura.com/garralda_userfiles/files/gofakolodevomaginatez.pdf
    • https://pediatricpotentialsnj.com/PP/PPpng/files/19763538825.pdf
    • https://a2designbg.com/userfiles/file/rasumetobenaf.pdf
    • https://giant-nano.com/app/webroot/userfiles/files/91530062206.pdf
    • http://autoscuolecasetta.it/userfiles/files/37200152984.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3ebe2a080ef064cf869203b4b28dfbad/xubukumumorigawemamux.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b121.bin
23c965bf544d78993183585ae6d88972a912d3db9f0392c8f0b70a4e50136701
pdf-font-stream PDF embedded font (sfnt) at offset 0xB121 17784 bytes
font_01_sfnt_off0000df5c.bin
ef5c6974d7e9b9d338d7c954570d075dc986d6976ff52d0def96688267d3dc37
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 10148 bytes