Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d51db160d54b84…

MALICIOUS

PDF

63.5 KB Created: 2021-09-12 00:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 69649ce45fd2a487a1d0da4efd302ee6 SHA-1: 25af7050e47c4806f3f37543091babfd27eab40e SHA-256: 75d51db160d54b845137b7d9ac9fce1f9fb1b15f0e143d588310d2c73ba57cb1
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

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://ohcsi.com/ckfinder/userfiles/files/19947119279.pdf In PDF document text
    • https://alhasooncorp.com/Files/files/3954445579.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/wotukejenevo.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/xavozigazediroforediru.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210904085419.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/65426566560.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0eaadd8f5969ee59c1b85d61f2144e31/faditijutuwi.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/wovifamerorefavesite.pdfIn PDF document text
    • http://airmon.hu/images/files/17881710376.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/xorop.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136ec7db6e8d---29454821435.pdfIn PDF document text
    • https://tl-systems.hu/files/files/vefurusepasowesefitamido.pdfIn PDF document text
    • http://jingyitech.com/uploadfile/46977352551.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/dukorojiboriloduzirulator.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/82971916092.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a0495ccbaedaf542a25c7b48d3b4671/ruxinenupe.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/69093233051.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/54878685796.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/3087684166.pdfIn PDF document text
    • https://phnews.ro/files/file/vifaxobojulogilakesajujip.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/bukomaki.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/62679951676.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/gozonajosegaperus.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/subugerewozifimi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+start+up+nation+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54B 10612 bytes
SHA-256: cf5ea67a7e51ccee481673dc520c6b03a5537a79733ba3efde5149b7fb8c295e

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