Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ece7a129016dc18…

MALICIOUS

PDF

70.9 KB Created: 2021-09-30 21:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2562cd5fb4dfa445b06c8af100228196 SHA-1: 75c3da20bdc70f40b740f3ef9aa7c9cbd1b57fc5 SHA-256: 1ece7a129016dc181c208be1644877a99cc8d6aa80a05303e0a73f23aa5c0eae
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a clear intent to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://wingtsunkungfu.ro/imagini_ws/62540602355.pdf In PDF document text
    • http://dydlhx.com/upfiles/file///nazaveporisasefogakisexu.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/797898574.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/88430897056.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161413bb249b5f---towogav.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/9526701126.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613689f7405f0---tusawupekanaro.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/83866314300.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/fapuxifekoti.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109080024381789.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/82668250799.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/gizox.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2ef74e336---jokivuvuxen.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613c82fbda21e---95028421947.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e8051ef268feff91d3ed6588a4b4d5cb/5475490162.pdfIn PDF document text
    • https://icoachyou.biz/images/ckeditor/files/92789252454.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10842790367.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/613ad58cf3ea6.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/12616988568.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/miwom.pdfIn PDF document text
    • http://guowangcable.com/d/files/62349659256.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3c90d1051---39593669093.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/lazubukaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=naruto+ninja+storm+4+apk+pcPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BE 17180 bytes
SHA-256: 5f253f8dfcfe5c633101d118e1ca4f3e52b23c6f54527a63261bf040074c37a0
font_01_sfnt_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 10732 bytes
SHA-256: c8585a6af36976893da746f1ed1b2886ab2f49e1bd72d3509e6691b4cfc594b2
font_02_sfnt_off0000f674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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