Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94a873199b231a1…

MALICIOUS

PDF

82.3 KB Created: 2021-07-08 03:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 6ed9390abc72a1984c588b3c09acbc68 SHA-1: 4de15b1baaa0adb7a3aa2b8289d834dcb46ca601 SHA-256: d94a873199b231a1521d84bbee437235ce79ad025f044fd3b322ca5f622e58bb
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The presence of multiple compromised CMS upload links and disposable hosting indicates a coordinated effort to obscure the true origin of the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086902d1d612---fujumuxosuvufepawur.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df8c6376c8---wopeb.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16084bb943ef17---67734473187.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1606f479f7bde5---fevuxup.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/kuxuki.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/jojabufurejeta.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e571f661e4---92893139769.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/6958abb3754e5f14297d22db821d96c1/64424977629.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/894600d60c3558a5df80f0981d09891c/3323703244.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c76864e66a---71029529912.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16092705e89ded---poweropokesok.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/996013dc4ca1053ada4df0b00c7a65f5/42992120508.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c01c6ebc1d2---zokafejonasasewi.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/61315706056.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/863221533fe3d4a1494de0fe8842257f/besaw.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/pokurilavepoxeme.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/jm570f7d9tt3pnhbn372g11f53/704181385.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/papisugijes.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/busumetaneputaxosarozevim.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/baa50b7eefa55f3d77be5731b03f08f8/xavovudumimoko.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/c98cc0b2e9b715a56a356bdbb6124ca2/namebuwolibibevunopu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cdb402589---31898777339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=lcm+of+60+and+90PDF 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_off0000ca40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA40 10416 bytes
SHA-256: 07293097dcc5b2c7e1bbdf47c87bc7f747b58abbb5dd243ac00e4eb9b582936d
font_01_sfnt_off0000e1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B9 16628 bytes
SHA-256: cee2c004fac09d50b2d8e3d8b03704b3db80cbf1b6ed7baa9b5ae3e0393dc91c
font_02_sfnt_off00010c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C45 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_03_sfnt_off00012225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12225 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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