Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2fd1f539e7d5233…

MALICIOUS

PDF

100.2 KB Created: 2021-07-03 18:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7a342cab4819a302567d9c8ba4276016 SHA-1: a6b9c0bcc83e01d1a0400d5a43a33fcc68cfd4c0 SHA-256: a2fd1f539e7d5233ff7c4ad2c8b8d429d790ee32521f7c9c0c294d3e3c80c855
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://cainghienbinhduong.com/uploads/userfiles/file/fuxifijorebazifosukixi.pdf In PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f62db41a39---41298193385.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f51a2866bd---72487581119.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/bns9pgetaobaqihpkakf925ikm/bonedowaben.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160861ec40d36c---85528528027.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b9f3bf49---43107693218.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a78a3ff3eff---tazewawov.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/m7dknkmu9kr9g6l5370m6es9pj/65417957671.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/todobamore.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/56a1ec5f00875ff0ea86d5e19e2c9943/lopotiduwijigemuwojid.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/50ae5bb7f9d9bdc364ce24e77499bd5d/15239875882.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/vodisalexanupaxe.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/xoregigepoborerekizag.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3eba407b6f---vopabexux.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/18659234296.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/mk97ulqkpi5ur1l6215iq8v88f/fajopibabe.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/3ptd1r9f2s1solaj2du7p5h888/garejur.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/2403598603.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dee0bf80eab---garokopifejebu.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/navilewiburewope.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e0405a8792357a4a3e732d2e20d1fb0/sodaponuronegivoxebaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=applications+of+ordinary+differential+equations+in+daily+life+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 19328 bytes
SHA-256: aad111f61827dbc97780c9737620d83e093bc9078f81d005375444797a755e41
font_01_sfnt_off00013bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000153de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DE 10952 bytes
SHA-256: 22bd49dfd7d519c2a94abe4047ad696f84eb82270a1bb5772dbd5a64c1ba094a
font_03_sfnt_off00016d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D40 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7

Open this report in the interactive analyzer, or submit your own file for analysis.