Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ffc422330f2509…

MALICIOUS

PDF

62.3 KB Created: 2021-09-28 21:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 808e3fdfe1173cbb0ba0b9fd9de27f87 SHA-1: ec47b3cfdad05ab3be1fd35a85f4622acea76255 SHA-256: e8ffc422330f25096a15f1c58ce3f08816e699a6cf8fb0fa22b52f881cd2bbc2
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, many of which are associated with link farms or disposable hosting. Heuristics indicate this PDF is a link farm designed to redirect users, and ClamAV detection confirms its malicious nature. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6242

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=email+notifications+not+working+on+android PDF link annotation
    • http://bluecars.pl/userfiles/file/kademabetama.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/dokumapap.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/rajamafujamirumaf.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/21389581730.pdfIn PDF document text
    • https://safetyhanoi.com/userfiles/file/66328014001.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/60108752773.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/93493898257.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/65268936676.pdfIn PDF document text
    • https://investincarpathians.eu/app/webroot/media/files/41825832672.pdfIn PDF document text
    • http://villacappuccina.com/userfiles/files/9355712145.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/lezomumewiwajewit.pdfIn PDF document text
    • https://brs.jo/userfiles/files/tikugugofebubipumemurug.pdfIn PDF document text
    • https://aleemanschools.org/userfiles/file/77233109055.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3f6d07eeb---90409047940.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/nanasapu.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/42773924286.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210912234636.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/texepigejaxaduxi.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/81615607153.pdfIn PDF document text
    • https://karthikaspices.com/uploads/file/29253690428.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210919230123.pdfIn PDF document text
    • http://sooclose.eu/upload/File/76885285067.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/ramen.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/bb4c56b5ccf4943ce40639ac6edc374a/texemujorikonebi.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_off0000b536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB536 10848 bytes
SHA-256: 889ba8a24084cc933006705a38b0167df0c301cf11a9edce846956eeb9de913d
font_01_sfnt_off0000ce11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE11 18212 bytes
SHA-256: b759e25ac81e47f3612e62fbeab980024e16291522c4eb82ea21bc56ffd2298d