Malicious PDF — malware analysis report

Static analysis result for SHA-256 763bbb710d60b9c6…

MALICIOUS

PDF

84.8 KB Created: 2021-07-02 05:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 75b81746d2633c48431501b4dcc7a2b4 SHA-1: 33e9ab6d38cc109ee397bf5b24d7fa3c08d6c05a SHA-256: 763bbb710d60b9c6a5eb627e645307f88e84125ccd3bc45bb0aff1c2ccc0320a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest the document is designed to direct users to external, potentially malicious, content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or content-luring campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7102715b9---24328620258.pdf In PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/70973731669.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/bizogoniwezakozog.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/98412713080.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/22764627785.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/fdb3ff6c6ebd05d50c5d467aeff4042c/80168395457.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607658cfce425---95275361591.pdfIn PDF document text
    • http://henca.com/files/details/file/bewepupebetoripurapoxuro.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638ff85dd7---luvekerinejo.pdfIn PDF document text
    • https://restaurantenunti.ro/userfiles/file/21466639071.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/5ip2lhr949l4iuuscqltkm4aor/64424206876.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e9627cff---85085139109.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819fd749dae---vidanufafonaxisuviwijim.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23128368d---83190670621.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/moririni.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/19662738051.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/04e521745018b50a16abfb9ff20f8d72/gapibujoda.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30838ac8c0---3983478937.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3152792042b4cf84df41a409de6425ce/lurirexala.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609482edc7c62---kanoka.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/2j7n88ka5lnvag097cao3dpb3s/86706918669.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608991dc3bc28---23362726890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=sims+mobile+money+cheatsPDF 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_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 17252 bytes
SHA-256: 5f952dfaf9de5c27b90b1dee30bb0128a35e5eb702c834c9b8f3c7d41cee07ca
font_01_sfnt_off00011564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11564 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7B 10724 bytes
SHA-256: 4ca1b3336d8c26f04c5b44a96cfd03da98ad144bee3d6b901fa81959dc012166

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