Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba57cd0caf3102ef…

MALICIOUS

PDF

62.5 KB Created: 2021-10-05 21:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6fcebe064943d11af4a90f88d91479ff SHA-1: 95c9019b26a1dbf1f1e36a86916a1dd987ae2078 SHA-256: ba57cd0caf3102efe8fe408d1c62d3cd391e0407a414aba23940c2fce64fe6b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to various domains, many of which are hosted on 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 phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5578

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://queure.ru/uplcv?utm_term=tool+marks+in+forensic+science PDF link annotation
    • http://pivotal-technologies.com/userfiles/file/51835537469.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/xoretize.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/1e55035ef837ef43323251899c11165a/vunetezuv.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/86802577497.pdfIn PDF document text
    • http://membranekeyboard.de/_data/file/44407233402.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/19900995771.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/21141325256.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/99980416787.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/9eab05fde7f97ad8c1b0117ad26073ae/tonarejopad.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/givosi.pdfIn PDF document text
    • http://zeci.nl/im/image/puwilerubemekoxiret.pdfIn PDF document text
    • https://ikansambel.com/contents/files/nubuloletoruzop.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/kepapunularajodubeja.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/tikakigewaduweroru.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/bd20cde44add9f68e36a1df5a7d252d2/gopaxajojekanijogijaniwez.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/buwodosuvijavinixugixod.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/81164778091.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/66158494301.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/49611405500.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/bebirurutudemafaxebibo.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/6377508786.pdfIn PDF document text
    • https://istanajp2.com/contents/files/10759290410.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161341dbd79bd1---lirerifefimagukuralofozej.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/7n6itg3idqavhn0duc2quh4f44/pewimuf.pdfIn PDF document text
    • 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_off0000c5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEA 10452 bytes
SHA-256: 5f03b63b26a36e848593f46a89d660bf47ff96ba4321319aa4358d35f0c68c0a