Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6e0eb22fdddd66…

MALICIOUS

PDF

62.8 KB Created: 2021-09-25 21:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9b9252a6239cfef6b89832edeb3fff38 SHA-1: 4a79a2c976364ead98062ec82e6d9cf3838f3b6a SHA-256: 7c6e0eb22fdddd664f9668245c586792e4dab31f23161fec7e4f67c8554a79fc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of PDF_URI and EMBEDDED_URL heuristics suggests the document's primary function is to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

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 http://barrybusiness-crm.com/ressource/devis-photo/files/datinadixaxif.pdf In PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/87180398532.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/botaxijofisofawim.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/fefazogesev.pdfIn PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/68783027883.pdfIn PDF document text
    • http://j1ent.com/userfiles/file/20210904064347.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/31469519467.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/vibizusutatuluzexor.pdfIn PDF document text
    • https://alident.centralcms.cloud/galeria/files/xusibapov.pdfIn PDF document text
    • https://proxus.nl/file/vulebuwasevor.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161455aaa11612---nuxik.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/doputijeximurovobolepu.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/funanepekitojujis.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/zewujexedure.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/vevataxonele.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/36301506306.pdfIn PDF document text
    • http://china-guolin.com/filespath/files/20210909184217.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613d756baa1de---godewixuwobib.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/samewafitusamuj.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/55890610289.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/magexo.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202191219658.pdfIn PDF document text
    • http://studiodara.eu/userfiles/files/mulirudinekojepud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ppsspp+game+zip+filePDF link annotation
    • 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_off0000af07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF07 14664 bytes
SHA-256: 1c6662dc6c27261a8360646d28a97b10e51bd2fae553175b204a0e2966c65abf
font_01_sfnt_off0000d394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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