Malicious PDF — malware analysis report

Static analysis result for SHA-256 e696eb714786cc95…

MALICIOUS

PDF

101.2 KB Created: 2021-09-07 13:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 77e168a6755a7f7db3cea811f63c4882 SHA-1: b7bdc12b21a7c1ed790eeefa13c266b567f8343a SHA-256: e696eb714786cc953c8b591a1e2ee9501cce3a477b7f0b65bd1c2a8b3f594161
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicates maliciousness, and multiple heuristics identify the PDF as a link farm pointing to compromised websites. The document's structure and embedded URLs suggest an attempt to direct users to potentially malicious or SEO-manipulated content. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f8eced4f07ffad1e49c384b70ed1ceb5/33626139142.pdf In PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/ada803a0bb5a41c7c60145b4ae86e9f7/52805649898.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a6ca4e0bf---38353276130.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/183208ef7d89d9552a27bc4fc50bdbbb/romugegobozolisimafuta.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/muromufepon.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54a0299b19---filor.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/2995801262.pdfIn PDF document text
    • http://uco-kampen.com/media/files/regojejixafinazejuwexexud.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/xizibenujunuxeberowiwol.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/65913444870.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/sefesewoxebuji.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9a797ee2793020a00c7c140e0158bb35/zufin.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3bfcafb6f---539584920.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/lopefarejakixexitufo.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a79ac132b---gatewekidotinapumogupi.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f5205f6cf---nudepiwaferatigesenozo.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/kikusiga.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/37513086752.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/zusuvasobugidako.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/14807532229.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/69930985839.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/xazetadavoguxanuredo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hays+salary+guide+2019+pdf+australiaPDF 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_off000122fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B10 18916 bytes
SHA-256: 2e865b774c24bd57ba6010e66c5bcc19113dfcb1fac2b70e49dfa9d9772d1d5b
font_02_sfnt_off00016cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CDD 11116 bytes
SHA-256: a7921ce74f87428b2d47a5ceb7750b98481a8df8b9a8d141be7ce1675291de17

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