Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d407543a84cca2…

MALICIOUS

PDF

81.6 KB Created: 2021-10-05 04:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ce6cbe83a10168cd5874246011be343f SHA-1: 5dc6da420c2a668983153554197a237db96ffb90 SHA-256: e3d407543a84cca253a2ee6cb65ef73539b06a24dda96de5cd16e80a3c4dfabd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or SEO manipulation scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high volume of links on disposable hosting, reinforcing the malicious intent. No scripts were extracted, but the structure suggests it may exploit PDF vulnerabilities to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6156

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://mariondhuique-mayer.com/data/file/67202783712.pdf In PDF document text
    • http://osteriadelcampanile.com/userfiles/files/nizekoxipibo.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/54263681221.pdfIn PDF document text
    • http://aweibel.com/Photo/file/36295445454.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/i9qgn9o7eti9brcou14gnm9k51/kuvajopipogufofejufew.pdfIn PDF document text
    • https://kvizek.excore.hu/ckfinder/userfiles/files/xotafamonilome.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5716a40c5---puwidajejapitonoto.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/79905067446.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/zitefenosuwubatoratomob.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/71147490502.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/tebekuvorokukefevi.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/duzojipisirijiw.pdfIn PDF document text
    • https://kingdom.vn/userfiles/file/kalosumagi.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/damasamubifalukup.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109042010075041.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=orange+breasted+waxbill+for+salePDF 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_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 10884 bytes
SHA-256: 62849d57a809ad8c50209f56757a51a30773dd0827a8de8ad90d4051edbb98f3
font_01_sfnt_off0001043c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1