Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f012971d6dc2312…

MALICIOUS

PDF

64.0 KB Created: 2021-09-16 00:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 44a33db059e025a5f34b5e4a4e97ed15 SHA-1: 0228e18814f009a1e219c92efc4c574c4fc6f26e SHA-256: 2f012971d6dc23121e305498d2d0de404364e0be200df57651ed3a0f05f442bc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous external URIs and embedded URLs, many of which are linked to disposable hosting and redirectors, strongly suggests a phishing or malware distribution campaign. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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://queure.ru/uplcv?utm_term=los+ojos+de+mi+princesa+pdf+completo+descargar+gratis
    • https://extremedriveline.com/ckfinder/userfiles/files/jefaroloxadugu.pdf
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/33646097244.pdf
    • https://radiosmile.hu/upload/file/pijuso.pdf
    • https://butchercurnow.com/img/shop/contents/kuvinagosujemame.pdf
    • https://miltonmattox.com/userfiles/file/36444212134.pdf
    • http://www.cavice.fi/tiedostot/files/39163346909.pdf
    • http://sjanzee.nl/file/voboripexotogolu.pdf
    • https://oolong-dining-co.com/webroot/editor-uploads/files/56034279627.pdf
    • http://rafaelstore.ru/upload/files/regadatekuluxokuwi.pdf
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87572027309.pdf
    • http://icoenergia.com/userfiles/files/zirigotanu.pdf
    • https://foulardfotografando.it/file/boropilolomogonuvejepad.pdf
    • http://school19-zav.ru/userfiles/file/demivo.pdf
    • http://hitecds.com/userfiles/file/52297813031.pdf
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/gatubaxore.pdf
    • http://phannhan.vn/files/usersfiles/files/gufitonupete.pdf
    • http://christmaslandint.com/userfiles/wifuloruzew.pdf
    • https://nulifeus.com/~nulife/userfiles/file/fanogamigujebuxixuraxiwin.pdf
    • https://toyotaautobody.com/ckfinder/userfiles/files/40242598726.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16133b9a70b1d9---8751837626.pdf
    • https://actor-conseil.com/files/file/linezikek.pdf
    • https://europartner2.pl/uploads/geminiganiromokosi.pdf
    • http://mastrodibaglio.it/userfiles/files/resupol.pdf
    • http://hangtatmj.com/userfiles/zawekugonopagurovokukew.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a9.bin
0a2b21dde19c37c17da47e34763a4b7495b6e90d6953ecb5c92015c552cf37cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A9 11048 bytes