Malicious PDF — malware analysis report

Static analysis result for SHA-256 804e44dd43eeb300…

MALICIOUS

PDF

84.1 KB Created: 2021-07-01 15:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 43ed7a786dbe5960858798db8cac2670 SHA-1: 27305575c1f4dfb2bf4187bc7226152519fb33c3 SHA-256: 804e44dd43eeb3003ecd8c25f96aeaf90566522ddb5a850c934d4a4c555cd7d4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://aashianarealty.com/file/metowe.pdf In PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/8011bc08b280622a5ad9fd020cb9d346/86819210629.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607dde761ff35---26976688843.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/jr6crjofugbqnk1sjmdnt9h81v/pedabasevivujetenewuzufo.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab446c1a3c3---15849169206.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/suvojuma.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f036ab5c6b932c1748bdc13dc1209b28/8850852921.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/98103320113.pdfIn PDF document text
    • http://orem.mn/uploads/files/50962778190.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/78981858438.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/tusisanedokufobitanofi.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc7c60f39---womesetibekezizunaxuk.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ad9280707---tajabokurun.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f7a368d82---figumavopeviguwexi.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3eac52777---25516081816.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085383c530ec---junawataxo.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/0a0de839c8a2dca9f31b34870e2e9f6e/39100689499.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcc0208e55---42813616150.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd3b9726c6---mozizifunobul.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ff37d5b78---85812025630.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/tejedowufusoxuzuwenalufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+power+of+your+subconscious+mind+meaning+in+marathi+pdf+downloadPDF 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_off0000de57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE57 18704 bytes
SHA-256: 3e0cbf8b5d39813a17ce85fb3ab3292417518c03dde82b3c29465cc9181a80e3
font_01_sfnt_off00010fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FB 11468 bytes
SHA-256: 4082b2e3989fe04337c424f7c5c789dddb3a4fe11e265339593a0cb8d6551528

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