Malicious PDF — malware analysis report

Static analysis result for SHA-256 3059ad58652559e2…

MALICIOUS

PDF

83.2 KB Created: 2021-09-09 02:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9683f1b6a87e505b9b99665fab4eb423 SHA-1: f65454f4ec27e4d54dba2e4562556eafc5b5e47b SHA-256: 3059ad58652559e28cee420abd1ad7b848ae496e7c80d36a7026f5b258268f36
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan. Heuristic analysis identified multiple PDF link farm patterns pointing to compromised or disposable hosting domains. These links are likely intended to redirect users to phishing sites or download further malicious content. The document body was unreadable, but the presence of numerous external links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3772

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://revucue.com/ckfinder/userfiles/files/jokitiv.pdf In PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/sasizugufa.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/fuzujikonivef.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xijapel.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/neposidivabumib.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343ca642533---tewebosidakosodafamaxiji.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/devisifapadolev.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/gebiwifudupozewem.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/fezajimododalukupuwokoke.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f637cd5262---gizupenobetepivu.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/bf2f8c0add35a5c77f89f51cabef3e76.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/bugagedopup.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/towinizogijivifirowuxokaj.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/pitubodukazoxuwobapibuz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345bd2bce32---27437271059.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/wowojutapubu.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/vatef.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/362138754191b2507230b6c625a5c103/2994037029.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/74875750436.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/30732726751.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/25105012578.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/56620467310.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/vagepabu.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613939b3edd26---fitejukutaladukeziti.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/kuganelerule.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109081917521130.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/1595316862.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+block+android+phone+if+stolenPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 11028 bytes
SHA-256: 3da2bed4a06fa3e42421ea1b83e68068bcaca1c8544a1bc2c21a51e7d6b27099
font_01_sfnt_off00010838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10838 17620 bytes
SHA-256: 2b77c3d41f925652d6eecd40b7b3642539191ba498a32dd9bd98681d3aff27da
font_02_sfnt_off00013647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1