Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ee22c21ace80c5…

MALICIOUS

PDF

94.1 KB Created: 2021-06-26 17:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4e54145a0a1abec4f8979978dd1d5294 SHA-1: 30e536e65a68202d85d8cbfaafa44a17b9421a3c SHA-256: d4ee22c21ace80c5e5fbe290f7a81e192be8ae3e379c62512ff0232d6828522f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It contains numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely serving as a link farm to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are strongly indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://medvor.ru/uplcv?utm_term=iphone+12+guide PDF link annotation
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/56840d06219809065475c3444825227c/dineziluvudega.pdfIn PDF document text
    • http://sun-eko.eu/files/file/51745305128.pdfIn PDF document text
    • https://ka-base.no/images_content/file/gozubadijajili.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba17698ea---nasolesupimawefabitatet.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/fohhc9kpr9fn6e77uebt49ul64/84677189775.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/30768828805.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/xozitokiker.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d87e91fb3---wovefexitobufasiw.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/enkn6kegrddj3ikspcc3rtmv7q/lifebomifedofomuza.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/66160257064.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/67178927336.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/40153764462.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0230caf67---zedanuliwofeposikoxabexu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1609b73c828f31---75725791511.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/70b26ec6d0df0fb0651bbb073d6a472a/29594919487.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/ffaf3ba2b2251913fa775d5412a48073/mufalusawulox.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/xiraleregatapo.pdfIn PDF document text
    • https://bloomeng.com/uploads/3576778700.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/jowuputog.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d045475135---37716093589.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/6ce00a9e3218a3f1441ea909b45a3017/36274019979.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/o3u1v2m49t3olmglirhj0n0077/34648234686.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1609e79eebec34---69195222387.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd5034eb39---gesuzetimogazuvami.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_off00010ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECB 17580 bytes
SHA-256: 4755d91b8dd10617b2aa14e065ea9fc31e32d1fdb1a3f9d068fd5fdcf1ec230d
font_01_sfnt_off00013c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154AB 10320 bytes
SHA-256: d6065330f5eac5a517d712e02d48159d81c2db30f0c4b070772f3742c7614e8e

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