Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd75ba3f33d298f…

MALICIOUS

PDF

64.0 KB Created: 2021-09-09 12:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 99f66cfec13550aeaf4dc09c9e200549 SHA-1: 70b25d149b2a972d130f258014e3d2f507fa7382 SHA-256: 0dd75ba3f33d298ff667aef4db39ec4794f6fbf1d867072a49106f7d4a046b8e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5448

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://smidgel.ru/uplcv?utm_term=basic+accounting+principles+pdf PDF link annotation
    • https://worldpigment.com/image/upload/File/tavojuzitaf.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/5025393947.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/wudabejulariwoxegefon.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/36319837959.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/cf71d5ba0b758a6f2ecaccd517bc23b3/86236288220.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/17697272193.pdfIn PDF document text
    • http://vswet.ru/f/83433060062.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/17406347977.pdfIn PDF document text
    • http://podarox.ru/public/files/sewitadazonuzikim.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/33099720908.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/xijelenogilin.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-7/20210907083720157697.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/bukakemode.pdfIn PDF document text
    • http://clingac.es/d/files/31831786243.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/juzisinesiduxor.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/86163411927.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/pofalisamawatudorile.pdfIn PDF document text
    • https://ptogel2.com/contents/files/zabobagotugemunazelatobef.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/92361833887.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/zikakuwifobususejufopil.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/tixesunarosikigokoxi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133adfb143a3---davomufenenibunutemota.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/dadatomujufirogutefib.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_off0000badd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBADD 15916 bytes
SHA-256: 3720e43d35b39e712f1b96feeba9ed4a82da2200694f191a422c8447759486f8
font_01_sfnt_off0000e3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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