Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35f367885534a02…

MALICIOUS

PDF

64.8 KB Created: 2021-09-16 06:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 92d8e337663e1d28f97e730e6a700031 SHA-1: abe405f2161bb0eecae2a9741095776519ba6d1c SHA-256: e35f367885534a029d7a2a567004e2ff144fcfb656468eacb1ab178828ef92a2
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged by ML and ClamAV as malicious, specifically as a phishing trojan. The presence of multiple links, including one pointing to a raw IP address, suggests an attempt to redirect the user to potentially malicious sites. The document body is heavily obfuscated and unreadable, indicating an effort to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7151

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://infrive.ru/uplcv?utm_term=gta+v+android+android PDF link annotation
    • https://adeptos.clevercloud.pt/images/items/files/sagavab.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/63268541310.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/zazobujago.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/61375150479.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/fopejunomenasojuwados.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/pinuvozikiterozivipupuz.pdfPDF link annotation
    • https://vildmarksjagt.dk/userfiles/file/10613319432.pdfIn PDF document text
    • https://diphong.com/uploads/dugapa.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142afd481e7a---68173072134.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/66520537274.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/furogusurunanoxew.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1613402a131e6f---rasamisikamirud.pdfIn PDF document text
    • http://autavrabek.cz/obrazky/file/jukok.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/86097482853.pdfIn PDF document text
    • http://agmapure.com/upload/files/godiredazofopemilolizod.pdfIn PDF document text
    • https://aahs.givingplan.net/sites/default/files/editor/file/83060715375.pdfIn PDF document text
    • https://satellietgroep.nl/userfiles/files/16141941511.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/zexeke.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/17590980204.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/5020015083.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/67522106007.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/69236668822.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/tetezajadiketenugamafaz.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/19409012555.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/felapoduriwegegi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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