Malicious PDF — malware analysis report

Static analysis result for SHA-256 68610f4cb9ca5d47…

MALICIOUS

PDF

62.2 KB Created: 2021-09-24 13:46:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8daf8a7af425b20587679eeed0345690 SHA-1: 8f36d7f088fdaf650a94f72a7a3cde869fc50684 SHA-256: 68610f4cb9ca5d4781904d559f3cb78a479b2bf7c3ceb313d1cadfbdb225748c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. ClamAV detection and ML classification indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5578

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 http://www.ddu-hk.cz/ckfinder/userfiles/files/20443242646.pdf In PDF document text
    • https://alpinashop.rudy-ra.com/files/9767093119.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/tetepujanebal.pdfIn PDF document text
    • http://tornyanggrace.com/upload/file/90455076313.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/69194941023.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/wugutoxuxoviwekolujibu.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/sifujaxawulokigo.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/tujagewuvezopulitefe.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/31729052326.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/siverefud.pdfIn PDF document text
    • http://jsjxh.org/filespath/files/20210914094340.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109101600347596.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16140726f5db20---23217154658.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/59815613798.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/2703580101.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/97223284806.pdfIn PDF document text
    • http://master-br.ru/img/file/75534497291.pdfIn PDF document text
    • https://wsbtitan.com/images/file/6003393919.pdfIn PDF document text
    • http://bamila.vn/luutru/files/tifufuzejobejowagegal.pdfIn PDF document text
    • http://jfe.hk/userfiles/nuwulinoluzexi.pdfIn PDF document text
    • http://explosivedevices.ru/media/file/69851928758.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/94346128760.pdfIn PDF document text
    • https://testagenda1.myagenda.cz/pictures/editor/files/85485232066.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/mumiroranemefelor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=avengers+endgame+allpeliculasPDF link annotation
    • 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_off0000b17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17D 10784 bytes
SHA-256: d956d552000062721fa3df09804425218741788f4080c9f36b1dbc21fbf05608
font_01_sfnt_off0000ca1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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