Malicious PDF — malware analysis report

Static analysis result for SHA-256 9886d3fb0279839f…

MALICIOUS

PDF

62.3 KB Created: 2021-09-25 02:26:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6521a04764976439308da7fbd74745c1 SHA-1: 134df103adece392b6d9071005653ea396cb302f SHA-256: 9886d3fb0279839f4504b4eada36275aaf846bd0ed7b9b4521076f5f88cb9897
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and the presence of 'utm_term' parameters suggests a phishing or malicious download lure. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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://nomylo.ru/uplcv?utm_term=internet+explorer+free+download+for+android
    • http://xn--9n2bn9mz3aba29g44r4o0a.kr/fckeditor/userfiles/image/logosoveminugadebozirow.pdf
    • http://mikol-styl.cz/userfiles/file/8521707670.pdf
    • https://mariellatriolo.it/public/file/34875493017.pdf
    • http://s2ipower.com/survey/userfiles/files/sifirired.pdf
    • http://hanstime.com/userData/board/file/pavupubuxibexuka.pdf
    • http://rem-stroymont.ru/img/file/larudigal.pdf
    • http://flomojapan.com/upload/files/muwibiponusugabumexun.pdf
    • https://kristaldicarlo.com/userfiles/file/55063453457.pdf
    • http://shopgraeagle.com/ckeditor/uploads/files/15897113892.pdf
    • https://matrainagycsalados.hu/userfiles/file/nodoverenudofim.pdf
    • http://doctour.hu/uploads/ckfinder/userfiles/files/50099596904.pdf
    • https://parlagame.net/calisma2/files/uploads/mibupilegaxadatuv.pdf
    • https://legyenegyjonapod.hu/userfiles/files/8832978377.pdf
    • http://flagrant-desir.com/userfiles/file/27102892224.pdf
    • http://www.offshoreyachts.net/web_upload/editor/files/82482514281.pdf
    • http://files.ibiza-ferien.de/file/wonijiriludevoranatukepas.pdf
    • https://braus.uz/images/shared/file/topufujozimumidusegupusuz.pdf
    • https://textmakareknutsson.se/upload/image/68415899081.pdf
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/47003512497.pdf
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/75799732537.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1614c0a7b05f4e---64156445930.pdf
    • http://ilink.pl/userfiles/file/61647937135.pdf
    • https://alshamiltrading.com/alshamilfiles/file/83880577263.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b132.bin
e774a9c41ae23b7222d3d4953cc862a431486ebe1608b72b03024e8f077f669c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB132 15008 bytes
font_01_sfnt_off0000d701.bin
6a1c5f01bce9f8cd1fc7e4f596f9187f35b84be598b4761046dbfb82d70f1017
pdf-font-stream PDF embedded font (sfnt) at offset 0xD701 10464 bytes