Malicious PDF — malware analysis report

Static analysis result for SHA-256 4547396071527070…

MALICIOUS

PDF

80.0 KB Created: 2021-09-13 06:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b3c80a11dd7991982ed6ce5c1307a945 SHA-1: 921318e35a99163a3f4ee21cae3babdb68b8ce30 SHA-256: 45473960715270704d53b19687dfef86a765655ad9efb653d851c81f8da9ca1f
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true destination by using disposable hosting for link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://tapuionoticias.com/ckfinder/files/vedaris.pdf In PDF document text
    • http://polipack.ru/content/file/vosuxigibar.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/14665469376.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/butegujus.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/40936624677.pdfIn PDF document text
    • http://newworldss.com/uploads/file/120568065.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xunugipes.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/66383038513.pdfIn PDF document text
    • https://red-adlay.com/upload/files/46428836662.pdfIn PDF document text
    • http://keramann.ru/uploads/files/zoxagalefen.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16134083a26d43---sumodosifitawipor.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/44577014999.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/63316597397.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/75115307749.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/debobar.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/zerorefel.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/37763130351.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161346b8dd9b38---90260442025.pdfIn PDF document text
    • http://sinostandards.net/upload/files/telebimizilofusigofap.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/4542090929.pdfIn PDF document text
    • https://rails-bg.com/fckeditorfiles/file/41637459533.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vatejukinilezowuva.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/dovaxunamivujuwataruri.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/saluvafedejuwuvimowo.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f3437ee3965fe832d510df910db8d7d/78447603185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=indian+idol+4+judgesPDF 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_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 18164 bytes
SHA-256: 54cd75b40f29e6f2b8cd12b1df76534586099a7767cade796d84e0c22e168ea7
font_01_sfnt_off00012175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12175 10484 bytes
SHA-256: a73ba2b417fcdf3d78b50aeaeb2c28dbc81375073f9b0ad3f5937976d54071fe

Open this report in the interactive analyzer, or submit your own file for analysis.