Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfeab041cab413a4…

MALICIOUS

PDF

74.8 KB Created: 2021-10-07 12:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 25326a5322c541d2cad41afdff378ea9 SHA-1: 32d2b03ef51cb1dc94f021cead7e6831b9dea2d8 SHA-256: dfeab041cab413a4b3e751c2e8b539a38e68dbb0125829f4c10322dd5dc458da
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a tactic to obscure the true destination or distribute traffic across many low-reputation sites. No scripts were extracted, but the presence of many external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4744

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://crysiq.ru/uplcv?utm_term=soap2day+princess+and+the+frog PDF link annotation
    • http://jsjxh.org/filespath/files/20210905081114.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/60253037355.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/10544516573.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/97427176747.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/jururoto.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/wowomifelumobarisoku.pdfIn PDF document text
    • https://foursservices.com/nbloom/fckuploads/file/94625015840.pdfIn PDF document text
    • http://domainecomps.com/documents/files/wasowosimexipukabagijad.pdfIn PDF document text
    • https://nusantarabet4d2.com/contents/files/56874802142.pdfIn PDF document text
    • http://podarox.ru/public/files/89541634704.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/tojiritufaz.pdfIn PDF document text
    • http://leguido.net/files/30035194670.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/duwigupejedelisumavidazaw.pdfIn PDF document text
    • http://zeci.nl/im/image/54028269962.pdfIn PDF document text
    • https://majubesar.com/contents/files/41428357374.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/58346761952.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/sibatusijim.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210916_6B1E47762EE61781.pdfIn PDF document text
    • http://zaiger.ru/img/file/wakovivabuxokow.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/86631411262.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4a17da0d43e48582382a499322051fc2/nuzevotojejiduxinebolez.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/38540277603.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/jedipipobe.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_off0000d726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD726 18872 bytes
SHA-256: 8feaa777ff586fdce00113ede42e3243f0482dad786f57e63ead1cc973e69d5c
font_01_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 11160 bytes
SHA-256: 94aa2dc6632ec981d979dcb196b76f061a229298b44de604f4ca43af91952ee9

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