Malicious PDF — malware analysis report

Static analysis result for SHA-256 3476315ea8774cf2…

MALICIOUS

PDF

62.6 KB Created: 2021-09-09 11:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2eeec5f0fbe416c654e12b30b75e47fe SHA-1: 7851520434ac084a7a26db1b61c82858cf6ff771 SHA-256: 3476315ea8774cf209a3cca6fb5cb5247ea0da949d2ac68392f1cb6bb3ac9f5c
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6056

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://suncables.co/images/file/kunuwuxapuxukirupaxemugag.pdf In PDF document text
    • https://millvalley.com/wysiwygfiles/file/31009291742.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/88419f2fc1ecd4ea56c9ce4e6665b2c0/78301732009.pdfIn PDF document text
    • http://360global.ca/userfiles/file/95398940456.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/14325097964.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/vuregujirapomofubi.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/998c590294c31254ec9dc89ad8e77993/7709216748.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/sefavarevogudumogi.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/5425430954.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/betago.pdfIn PDF document text
    • http://identik.hu/editor_up/59660791509.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/bewebono.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/nakibafetazewapofete.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/voxetuzupomu.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/lasig.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/zikifufobeg.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613062871c3c1---mariruwuleperefisinike.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/tugedafak.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/59860543172.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/kiwojudoperu.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/43107589344.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130fff3bd27c---53557146758.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/ririxajiduruxulanubozos.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud/files/tujovekiluxevafisejara.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210909135454.pdfIn PDF document text
    • http://ranchobg.com/img/file/90168706625.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=wot+blitz+120+fps+androidPDF 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_off0000cc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3F 10844 bytes
SHA-256: a9c5f0dbce3b1247c6d07574e70f402a0dc9f6cc428c0247e21f787adda315f4

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