Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2d03d6ebe7d4f7…

MALICIOUS

PDF

99.4 KB Created: 2021-06-27 11:04:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d1aac1c7aec0c2a349c943433e96ff77 SHA-1: 35b2167c5b53429eb2e388a2d171af5a4554bd94 SHA-256: dd2d03d6ebe7d4f7a6b78640b479a449249d7d99e43ce012ae9e490d5cdd5abb
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is used for malicious redirection. No scripts were extracted, and the document body was unreadable, so the primary attack vector appears to be the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://crewmak.ru/uplcv?utm_term=holes+book+free PDF link annotation
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c8623b44dc1---mafuveledekiwi.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c14a25ef9d1---minuwo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089c92b742ad---pizinevewonokadud.pdfIn PDF document text
    • https://chptravel.ir/data/file/42596901126.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/ruxowigab.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/99090012247.pdfIn PDF document text
    • http://biblioteka-koneck.pl/ckfinder/userfiles/files/55827555173.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8871201bbc---33098013311.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f74724c37e---befevixuvuzudo.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/69263380588.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/449b2f4b1a684c717e076cb243da0d01/gixukisazemakifefid.pdfIn PDF document text
    • http://zae.me/datafiles/file/19043029242.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/11fa0cc1cebe806a8f3330212efbccfe/bisixadekawavofutil.pdfIn PDF document text
    • http://firegallery.ru/img/upload/75163184100.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/0defa25dc2fc4974ff110f7f2bfe7380/1899689022.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/muwazidupo.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/4990oqd3i86lmqdk0ctrn5dqdr/bupusaf.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609edfdc2fec1---kamoviv.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082037e9a1d1---49096878713.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/4336322088.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/d4c01274da60dcc109b78ca97c0882f5/sesemotanamidimakulupo.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/edb5b1b7838dce6592fe3fa417309473/fuvenipizokeretev.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/vqglsr2at2jqnku95rhe7s7am2/49808546150.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_off000122cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 18344 bytes
SHA-256: f345a3ac5600c4e91b8aa7e5a4c9d58db7e3b1c7cf965278246832180936e28e
font_01_sfnt_off0001528b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1528B 9972 bytes
SHA-256: 8fa580a9ec8d584aea817c058883407d8d612d2ceef6f2279f613f8beada4f45
font_02_sfnt_off000168c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1