Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2bd9bfaf357bf4b…

MALICIOUS

PDF

64.0 KB Created: 2021-09-10 18:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 182b9a04f6517fff337e6e2162550bf3 SHA-1: e0fd4d37c7306f7de1fa0910534f19bd8335ae7d SHA-256: f2bd9bfaf357bf4b1b918c1e65a75a552d2e2d3f8ea52847702039f906191f9a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8418

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=pes+2014+apk+download PDF link annotation
    • http://diplomat2014.ru/ckfinder/userfiles/files/30737319139.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/jbi0sbm6b8c2k5aq044oiig24n/retavixujuferibupide.pdfIn PDF document text
    • https://ltes.tw-goods.com/UserFiles/files/76791432808.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/fepopadeba.pdfIn PDF document text
    • http://schubert-hh.de/image/file/wabapemivo.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/mizukipag.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/kujatobibujutagijupig.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/56448891621.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/movabekawigobitag.pdfIn PDF document text
    • https://slide-bearing.com/d/files/59904387604.pdfIn PDF document text
    • https://sooryasales.com/uploads/file/rosobizipo.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/84964989244.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/jozafigu.pdfIn PDF document text
    • http://synphabase.ch/upload/file/fegamojiposi.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/17737717193.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/20355723697.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161329aad7533c---tafavodu.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/27178199187.pdfIn PDF document text
    • http://strojsteel.cz/webpagebuilder/ckfinder/userfiles/files/jagoki.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/baloxomakomixitokemosaru.pdfIn PDF document text
    • http://3gr-group-com.gbintl.com/ci/userfiles/files/57679665110.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/xikokemixuvun.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_off0000d473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8A 10644 bytes
SHA-256: 538aefba692afc57fcb8155653f2b6cf87d5b91a10b3d2ac387a7ec697f0aa18

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