Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddb08ba391f06d4…

MALICIOUS

PDF

81.7 KB Created: 2021-11-02 17:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: b98e4f6fc2c39f96026ba756f0f16332 SHA-1: 6f00a96b2794ce0cf8dbff63799f48bb78b83d23 SHA-256: 3ddb08ba391f06d4485cd0c460e3c5c408e6b9fcc011a2175a6b20efcbf94bf7
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • 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://catamma.ru/uplcv?utm_term=living+expenses+in+russia PDF link annotation
    • https://n-v-v.dk/userfiles/file/rugebakuxupiretonuturi.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/lelinoki.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/nikumusufufuvugi.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/36901219070.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/161779a1a2f88d---47664360643.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/30633749550.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617be9b49b764---bolizilagonemagivewoti.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecf2e7fd20---49200850211.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/83105163204.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/vevofifosujeketu.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/74383874246.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/bojobepebab.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/86986958510.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/70807722350.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/adf61f9cc72f11d773100d832de5247d/zavus.pdfIn PDF document text
    • https://zagladaold.holocaustresearch.pl/nowy/photo/file/wafekenisevel.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/16385477336.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20211007173246_3734ug.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161742f954e89d---temifowovuzoxerajifafe.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/28399756161.pdfIn PDF document text
    • https://chambres-lannion.fr/userfiles/file/goxinelop.pdfIn PDF document text
    • https://lyna-garage.lynacarrental.com/htdocs/cljr/data/files/suruzafiveralekafe.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/panejeviduke.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/81901674391.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16163ac1991202---raguvobib.pdfIn PDF document text
    • 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_off0000d836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 10388 bytes
SHA-256: d6af53511ba308d8e7eac22e2ef852cece36038e6e0e6c1b79ec3bfd8be42fee
font_02_sfnt_off000107ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107ED 19304 bytes
SHA-256: dd008e730494410f4d06547211ede014fa178b0f4433f1ff52f091d596454f5f