Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced5ac4f478039f3…

MALICIOUS

PDF

77.6 KB Created: 2021-07-18 13:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9af3483036cfe096b0910c14abe48495 SHA-1: 2e459c1646af9fd5bdfb2015e378910670d1b980 SHA-256: ced5ac4f478039f3b59f524ba80ff04bfc8636af2d566ee4fba8e3ff3e73bfb6
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9705

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 http://osc-pribor.ru/products_pictures/file/14554026737.pdf In PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16086eeb69bf6a---xijavezowenigatak.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/72372847471.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65e17036bd---88787366011.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe0dee0296---60052746622.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/betadorule.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/09a7f01882e92f8469df0be3721c11ae/97235796083.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606db97722787---31186951737.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/zawemovakabo.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609249953889d---zenaruligoledekugeji.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2439d04ce1---butivipabipawokenofen.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1fb081c8d---pomepovom.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/31094644284.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/tizuduxekewizigofone.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d022800db03---ratokokiveto.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a4d376b551---guwujezepumesudo.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/56228562677.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa0eea2c95---56997795490.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f45f36d79---retidejufalanawur.pdfIn PDF document text
    • http://locthanhwindow.com/img_duhoc/files/46007337266.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/piravaninojok.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e29d3905bc0530ffb61208df5faef7c9/44397054066.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/4a564d6300dbf3278170629a512ef310/23244255610.pdfIn PDF document text
    • http://www.asslar.de/downloads/balodufum.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/fisame.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/s1oa7sefebbunomo9m7epef4ou/92851532507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=skater+of+the+year+2020PDF 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://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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EA 16880 bytes
SHA-256: 6d8b1ec53ca7c002f5ac34466ec146d85cc984bc3a76fee4c7b5c22698211c9f
font_02_sfnt_off00011544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11544 10424 bytes
SHA-256: 05835d0d16e004198d0f4db49003f7a896439a97bfb65ac2634ccf523dbc624f