Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0d5a14ebf1f94e…

MALICIOUS

PDF

63.7 KB Created: 2021-09-28 03:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fb7492b08494e1d698b9fa084c394981 SHA-1: 3c240cac6c76552bc31c400944b6668fa649e832 SHA-256: bb0d5a14ebf1f94e626ad626a71d47466ba728e804822b6ce59e8c0e9fbfe80a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5690

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=paw+patrol+rescue+run+game+download PDF link annotation
    • http://bioident.pl/photos_fck/file/47039490448.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/xalajodedis.pdfIn PDF document text
    • http://infinivideo.hu/sites/infinivideo/files/72290243515.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/sikokisotoxut.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/41601143764.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/kiwaranolekisewap.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/posizimigarixiwilemu.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/80352229073.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/fefakigoduponobatom.pdfIn PDF document text
    • http://cochemical.com/upload/files/50341349219.pdfIn PDF document text
    • http://xn--9i1b14lzokxjcrti5um.com/upload/fckeditor/file/sakodifodeworuxosufemena.pdfIn PDF document text
    • http://coumert.com/images/file/dubamuvanag.pdfIn PDF document text
    • http://sial.pl/galeria/file/gaxigu.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/26645082170.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/gusuxabelumolurik.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/77333970293.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/retaxasevu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130054f17791---gewagixawod.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/42948474065.pdfIn PDF document text
    • https://vzglavniki.net/data/file/36129826710.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/lisox.pdfIn PDF document text
    • https://hoavily.com/uploads/files/74420457976.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/561cb7b3a8b5d5449ad5d36e950f9bc7/18967969315.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/29828420454.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/9371137874.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_off0000b386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB386 10952 bytes
SHA-256: 5784a1ade9fe70d559bdf3af1eaedd8a287b5be2b22bc875860f6a69017a9036
font_01_sfnt_off0000ccd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD8 15220 bytes
SHA-256: 1d32b7242bc644171e1c1a99761c92c121a8e28c70ab02a3e559eecf368e4457

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