Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7eaadfabe3efc3…

MALICIOUS

PDF

74.3 KB Created: 2021-06-28 15:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 93f8832faf433b35ece307e26da14e2e SHA-1: 2e6f92bb346a56f1982a06cc1c2ec3d4c49e56bc SHA-256: dd7eaadfabe3efc33fc171e3dda4281efa52a99ce722a3d91efb9e141d701770
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body was unreadable, but the overall structure and URL analysis strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/314c3461c08ccfce74b1aa7ff374db4c/nudepoxeniginotu.pdf In PDF document text
    • http://edu-family72.ru/content/images/uploads/file/fosizekulakubuvuwu.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1304e3fe---85954928956.pdfIn PDF document text
    • https://neplatnasmlouva.cz/soubory/bojef.pdfIn PDF document text
    • https://argumentua.com/i/file/80358233298.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/22539958142.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/28473328488.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f9ebe0399---65751920803.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/16975236286.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/4ck8o0aj844sdimu7u6fbsuims/rawurabigezepemi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/ns8ngvn43ebem5gov1l4424rf3/zapipik.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/7ad962847651fb891ae15334140ed8c9/xemajosis.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/d083d1730ba69dc9b08c0f524d2ddd77/102165488.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f9b420830a9d583efa7e3ddc68bb0e60/51061741580.pdfIn PDF document text
    • https://wittnebel.dk/file/nabasarisudoluwuzujebeza.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/bunafetefozesorov.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1017bedc---lozodutotus.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/29478914419.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/78512018647.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a36bf8c793e---21075558150.pdfIn PDF document text
    • http://amandamaitland.com/images/file/ponuzodajogodu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b57669c2579---foxukinavib.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ce524b9aac89de14b6ab5b0d6234cf47/37403517067.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1a335349b8b7f6eb9c52dc6e507fc35c/99381381972.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160929031ae746---tivuxamoniponetoguwer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=indian+trail+scituate+maPDF 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_off0000beb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C9 10460 bytes
SHA-256: 33fa1ab5c5b7f3c439c0303f21cb7216d8499c691697b941f06ad998c0459338
font_02_sfnt_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 16748 bytes
SHA-256: 97a295513064081d55e70a198b9b1096c2311fdffb2c09b6991c27165e3f2abd

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