Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3780dbbf0cdb900…

MALICIOUS

PDF

63.8 KB Created: 2021-09-18 13:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a37a4344f17e975abee1faf307a066b2 SHA-1: 4ad456b5641e367ca7ed89a07eda697499ceafe3 SHA-256: b3780dbbf0cdb900e74345b90ac513ff8364ee93b840b8de6ea12e96f69ba514
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7095

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://marathonlaval.com/userfiles/files/xovivanimosunevomam.pdf In PDF document text
    • http://iberia-ex.com/images/blog/file/87357207762.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/mozekoselaj.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210907060642688.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/muzusedativ.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/87370070118.pdfIn PDF document text
    • https://casasholidays.com/scgtest/team-explore/uploads/files/rumapag.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/waxowevezisogegepemuti.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613e02829d1b3---7282349577.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/3f9ddb84b7a1857bcf4afa0abb07dd43/garotivezirisafuvurupizo.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161422d7666db5---5226125539.pdfIn PDF document text
    • https://pcetravel.com/files/file/8144243209.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/7edc8b0b7123719d986efaa85d341410/16582038764.pdfIn PDF document text
    • http://trieuduong.com/images/Download/64918831476.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/15736783929.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/walejagepakuxusel.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/84234859016.pdfIn PDF document text
    • http://webursitet.org/Files/file/56024005464.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16138746e69cb4---kutuxasuw.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/50781262624.pdfIn PDF document text
    • http://www.memoriahistoricamalaga.org/ckfinder/userfiles/files/87998608323.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/foderubetopozibipi.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/sma9ouob26dga8broiuufvg30q/redapoxotazotifer.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/js71kso5kgp7ccac1sb4vl2etd/nagamarumaj.pdfIn PDF document text
    • http://metabolit.ru/files/file/gofinipol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=krillin+married+android+18+episodePDF 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_off0000e000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE000 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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