Malicious PDF — malware analysis report

Static analysis result for SHA-256 a247a59c698a50ed…

MALICIOUS

PDF

81.1 KB Created: 2021-09-21 00:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9c81414441cea313452ba216adf3afc9 SHA-1: 7ac3832a7a6c76e66d74e56da1b0c2558b4dfc60 SHA-256: a247a59c698a50edf7139fbeed2df08747185c942f4d6e74a17fec18eb34bb3a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5648

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://vibanghanoi.com/uploads/files/tozumeserug.pdf In PDF document text
    • http://mawratanews.com/armedia/uploads/files/komugazasumaduwiwan.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/96975862663.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614109e22eed4---71222512360.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/cf75a92e32d48f0359cd7d6cfa8327a4/83067227760.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/81340312726.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091111555673499.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f69e1bca9---sadakivigixesepusofag.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/dejelowawakogoli.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b58ebbc9d---31013221780.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/tofanerumuxaxujevu.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/lofagulozivufirabag.pdfIn PDF document text
    • http://kprmk.pl/userfiles/file/71126178770.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/38581712779.pdfIn PDF document text
    • http://cy2hand.com/userfiles/58005390220.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/15027365692.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/58581972481.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/31478577258.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/jupelexefazinosiru.pdfIn PDF document text
    • https://cargotavio.ru/files/file/piwazena.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/16494743242.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/44977124372.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/levufafusesulijuvuvubovil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=harrison+textbook+of+medicine+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_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 11060 bytes
SHA-256: b8d88fa7da673b7d1962c183f3779f6026a601ece0f09b06dbfbe606f913b840

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