Malicious PDF — malware analysis report

Static analysis result for SHA-256 db1788bf162f7de2…

MALICIOUS

PDF

69.1 KB Created: 2021-09-17 20:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6fff779580abedaccd71d9eb0aceb064 SHA-1: 436ff2fc51c78cd05b34e4ea6ab5ff495f0b18fb SHA-256: db1788bf162f7de27a7cae67480adb01fe8123caeb9afc24c31c737ca7df193b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure as a link farm suggests it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/lqg7jbv79ue8vhgaerslu2isp0/mazixup.pdf In PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/xeluxogitiruro.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161349266004a3---nevubutigisagemivut.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/977ccfa01e87139c720e2ef852a0a2e6/waneve.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d713b5296---wuxoxipuzux.pdfIn PDF document text
    • http://haai.org/upload/file/jetapopidedaxogedobap.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/93567214290.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/76662166330.pdfIn PDF document text
    • https://eklyps.net/images/file/83643578991.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/wazemokezuguzenawasiwofuz.pdfIn PDF document text
    • http://styrexon.cz/userfiles/file/wozelipoxemik.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/924e8dq33a5geocopo3b06pcs5/razavepofejal.pdfIn PDF document text
    • http://soles2walk.cz/data/file/28332497875.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/toxukomoneruvujusitome.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135dc8a2042f---pitazun.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/50446115288.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/92524101744.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/54849727388.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/56599771248.pdfIn PDF document text
    • http://artepcb.com/upload/files/pomidanu.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/01f4ea01f15c8d4142575e81e2c07e0a/84096010141.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/vitifo.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/sakamikepevakuladez.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/3595775823.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/jevofafevuta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=nouns+that+start+with+wPDF 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_off0000b216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB216 10188 bytes
SHA-256: e57cd7f82185dbbbe83f0705936a1f1083268a736c613c4ea182a8d0b5813996
font_01_sfnt_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 15000 bytes
SHA-256: 3787f62860fe264700f72dc4cbeba261b13ee4568a433d0a7c1bbfb48f5021b5
font_02_sfnt_off0000eeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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