Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee308c924c9b828…

MALICIOUS

PDF

68.5 KB Created: 2021-07-12 17:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 32cbe34fd67d3f98737f5ac4309704dc SHA-1: 0675c54eb25f90cff947c46746d5871b415fb668 SHA-256: dee308c924c9b828740507c54cf5ce70455caf3958325b47b0328d2a5406aed0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to numerous compromised WordPress sites, likely intended to host further malicious content or phishing pages. The presence of many distinct hosts and the use of UTM parameters suggest an effort to distribute malicious links widely.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://medvor.ru/uplcv?utm_term=inter+1st+year+exam+time+table+2020 PDF link annotation
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160adc86946ba1---66920266305.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1b4a9de60---tedalilinebijagurapopelu.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7913510856---94298084921.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b268623c7a5---19243275746.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/tifosurigagu.pdfIn PDF document text
    • https://alula.com/wp-content/plugins/super-forms/uploads/php/files/b0587dd80bd5ce2810e7a66fcde41fb8/relolatan.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/berotedexinodar.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/javumenujowiz.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/govejededu.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/4940409912.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/0ee9ced2ddbcfddd7fce746c7aafdfe7/87524827546.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160964f4d3f754---86355609039.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f1cdqqvm6uk16ohs777sm2c501/59208221071.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/65214254658.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd784916824---zesejularamumupisasum.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092e6138878a---wuzovigixisenatimapu.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160844ab787dba---dekeke.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d994c82c8c86cbd7af54542308e048ec/34237709320.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/d2eee3de19ecc0118e34f5476355b542/suzadak.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e83fbee9d0---91070191929.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/80349120997.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DB 10752 bytes
SHA-256: fa3cc2f41de4b732366a33fd356491b6c9963be0e427b6050f176a54c1e406cc
font_02_sfnt_off0000dfb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 14272 bytes
SHA-256: 5287c19ea587237c0bb00ad79b9ded659607d02955652eb50df0ccd829c8de90

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