Malicious PDF — malware analysis report

Static analysis result for SHA-256 07edaa94479536e9…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 02:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e01210b03db42853d932769f65ea7064 SHA-1: fdd11f3b8aab883adb3807139a57c166e90fdce4 SHA-256: 07edaa94479536e9674f3d7edb89a800902f3507274254db490d9718cfc9f9a5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to link farms on disposable hosting, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6611

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://laborke.ru/uplcv?utm_term=dj+cinderella+full+movie+in+english PDF link annotation
    • http://www.heksan.com.pl/file/26046486017.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/lewalajuwowaveruxa.pdfIn PDF document text
    • http://polyacer-ecp.com/userfiles/files/20210903_025003.pdfIn PDF document text
    • http://mgrima.com/files/file/nazuwodedojegemeti.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/giwax.pdfIn PDF document text
    • https://komunalno.vrgorac.hr/files/viviremefowadovasajeveru.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/jawuzurulin.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/77129604990.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/joxubaz.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/18035267678.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/tepejorokuzavi.pdfIn PDF document text
    • http://integrotech.pl/zdjecia/file/zejeguxuwogunuvipamonebu.pdfIn PDF document text
    • http://geodez.com/pliki/file/rajijinoxobog.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/45456371452.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/94996981476.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/20219313884352.pdfIn PDF document text
    • https://aksusu.com/upload/files/49934590690.pdfIn PDF document text
    • http://grupophi.es/uploads/files/18136005385.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/81998023781.pdfIn PDF document text
    • http://18554080.com/userfiles/file/76796491448.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f60c30318b---81353381679.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/vilitivibiv.pdfIn PDF document text
    • https://upbilbao.com/ckfinder/userfiles/files/28930875303.pdfIn PDF document text
    • https://maconlux.ovh/userfiles/files/86608297580.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_off0000e003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE003 19500 bytes
SHA-256: 5f3a271b563c69a6071183a011a5c0777ad458ca7256e4eae97856b1eed6419b

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