Malicious PDF — malware analysis report

Static analysis result for SHA-256 f765bc7c47661242…

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 00:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6e021aa380b2ac779304fb7abab957b1 SHA-1: 2f4a98f34608a7b63685415227babb5a36d455d2 SHA-256: f765bc7c47661242d1915f7ad258c48a9289e608fbd2cf74c5a029b6a6022e9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm used for phishing or malware distribution. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the linked domains suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://nomylo.ru/uplcv?utm_term=magnesium+and+hydrochloric+acid+balanced+equation PDF link annotation
    • http://sklepjola.pl/userfiles/file/furapupedaw.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/51308849823.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/33917782233.pdfIn PDF document text
    • http://pinetreerealty.ca/clients/55933/File/8575088481.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/rawasevolurup.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830f17aa80d---rozizakarinanakudom.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bbaba40ba---tajodexotatido.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/kikezunizujexoni.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607194958c202---84767435068.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9fbe2a97a31b27ac056d63ddf697de29/romulofokidokotisebate.pdfIn PDF document text
    • http://jejuecotech.com/ckupload/files/gutelasinajikozo.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2605c32427---zuzivezegofufowosukefi.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/2e975d65b41712ddce4184190fa92076/xalejabojobikutulosagi.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/19452893269.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c63e457be0d---32403285246.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/5vt9hk23d59ha7q73aleu34r8q/ranademezidijevupozugote.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab430b13e31---wuxuzirimaxaruvu.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/64670927957.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/zamuxigijaze.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14c7116f0e---gaxebexavumubu.pdfIn PDF document text
    • https://atl-50.com/files/file/76845943879.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/63769386590.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/9b7d84c4a6b090ffcaa45215ed1ea1c9/vaxixifomapojabuwubitixe.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/139aba882434c80e2b384f65b503554f/99508982283.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba54959683d---5975248087.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_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C75 11308 bytes
SHA-256: 140a23475d4e15a483c4c6fbc650b1ac761c3c820792d28a617ea3f7a0794c7c
font_02_sfnt_off00012655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12655 17084 bytes
SHA-256: 9115cbb38a5eb3361e33024bc3f1b210ad0b8f77e80d62762c82414f8e6a5fbf