Malicious PDF — malware analysis report

Static analysis result for SHA-256 edd86bf35d9fc38b…

MALICIOUS

PDF

63.2 KB Created: 2021-09-05 14:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 29a08e9279cc80b25efad0cd83a095b5 SHA-1: 82b52e87ccd284674ee94a55c2e09242e99fc52f SHA-256: edd86bf35d9fc38b2e04b55795802fd85b1756c7f8d3628809cc45691bc181e0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm used for distributing malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7025

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 http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8639a8f3a---11611406590.pdf In PDF document text
    • http://www.heksan.com.pl/file/62986478875.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/71610672893.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/buwejafukowogotofa.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/nalonifewenolov.pdfIn PDF document text
    • http://vhshf.de/File/21581830877.pdfIn PDF document text
    • http://all4pets.cz/ckfinder/userfiles/files/domirubizedewojenemu.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/d611c92a98e7f4d7487cab9b8d406c7b/xubatefopotofuj.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076f3f404c34---meripozuzagasa.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/j4cpvvdb2s4hr8k7b4gjrme1rv/xopumizegibosaz.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/joxodexumajawudobesi.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609623c7740d9---vosasisa.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/jabanatanex.pdfIn PDF document text
    • http://namlongprojects.com/images/uploads/files/nevenulaputozafoku.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210723_30129B43854C6E70.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f238074df85---53797613813.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/firigupagubiwufuti.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05fca1fe27---44834037534.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5a45547ba---fuxojabirutupofadixupo.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/wuseda.pdfIn PDF document text
    • http://smithandfriendsfamilyreunion.com/clients/d/d0/d05d9bb0b75700e7199fc64e52c62161/File/mukamufaxibunovizazata.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210618_179FB88D56B42DDD.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c162aaed---63729996560.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161101a72082ca---4873798129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=foxit+phantompdf+portablePDF 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_off0000dec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC0 16304 bytes
SHA-256: abc83386f728e60d5cb0e17110c086e93d61a70e4f20e707ba6670e9feed5b92

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