Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d558f47f93f1f5d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 14:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: a2becfd24b3af7296dcc6903f76a7eaa SHA-1: 065440e222ae599f5500e987a159a708d8103543 SHA-256: 6d558f47f93f1f5d4d7c0af3d4c2ba2bf77d2f5f3746bb03f873bdfd931ed4a7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ferrocom-spb.ru/userfiles/files/65944379236.pdf In PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/puzizasakomam.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/37699175269.pdfIn PDF document text
    • https://beamstraffic.com/amb/userfiles/file/78299368894.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/7492d7590a3cc882a319dfd03163aeb2/50448821099.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/mokoxeluge.pdfIn PDF document text
    • https://telorgabus.com/contents/files/xafevidumejodenesuro.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/83057450198.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/zokelipodamajitozux.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/tiroforodegowogesotipaboz.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/sovenunakaxi.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/53700982555.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/movuji.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/95798008482.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090718595273499.pdfIn PDF document text
    • http://rc-saty.cz/gais/image/file/ropane.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/tusenid.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613370992f116---71744520869.pdfIn PDF document text
    • https://triosms.com/userfiles/file/88982257823.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/19304346715.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=vocabulaire+progressif+du+francais+niveau+avance+pdfPDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/zizububebuk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47F 10972 bytes
SHA-256: 600ae651716242080ef374cc8d0b68292486a57132b544a13a09532e62f94696
font_02_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 20136 bytes
SHA-256: d7a72670c3e0f06fddeca385befb51278f1b30d495fbed95ad7cf84c67f77223
font_03_sfnt_off0001217c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217C 17004 bytes
SHA-256: 1433fded29aae041a3fd2a7c201252c8006738d9b88bdf90fb1975ecd3ac5d65

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