Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20c7817bff3944a…

MALICIOUS

PDF

66.4 KB Created: 2021-08-03 05:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a6ce4a5cef5858bb373c06914ef83755 SHA-1: d73c02899bcb83d2c5ddbc06e2729a98591ffee3 SHA-256: a20c7817bff3944ae7bd8b0083b8ea4cdb4c6e742033f849e9874c9cbdd5327c
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host malicious files. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9706

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://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1517ea1d2---fewidijuzijepemel.pdf In PDF document text
    • http://suttonoakfarms.com/clients/880813/File/nezano.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/loguroterofak.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/87629169197.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608196ceac3d1---rakepozepekufuje.pdfIn PDF document text
    • https://trunglamdecor.com/uploads/userfiles/file/tamopegeg.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7e5f07372---50949569148.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/40736366471.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6748a80a9---1201504760.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607828c65640c---18035746960.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/nisapujiwuvolazilowipol.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/tf16hvso7catccecc1vln2hmi5/41248436940.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cbaaa2d5dee---93130005064.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/mipegemidifimo.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/15976144812.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/juxigimenupemimo.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bce3a981ce7---lezisivojubogajutuk.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928c13525bc---givekolatenefegal.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a675b34f156---vojilesi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/bae7gbjpeirh2cbr094124r7o5/72713188042.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/26664427094.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/98f036be82e6a3771783488cce8ad0aa/2715679262.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=skyrim+kill+amaund+motierrePDF 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_off0000f3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 10624 bytes
SHA-256: c2a087b69a37e5c8a65e766d67f1ed2dfff3c039286af91c148bd4b9d91c59ce

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