Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99438e26e42e2bf…

MALICIOUS

PDF

83.7 KB Created: 2021-09-11 03:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 2cb4e5ee00dd8d0274ab7e8bbebeaf98 SHA-1: 58d8ba434083a4c826b8b403604620b8d55c8dd9 SHA-256: f99438e26e42e2bf1ef00f32602d5634abe6ecd6d82afbd3dc8397e0a3d847c5
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://arabic.cz/ckfinder/userfiles/files/79170614500.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/272af9rigf0c2sq5heq11lkkm0/34843193750.pdfIn PDF document text
    • http://synowka.pl/galeria/file/27734479360.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/97204194854.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/mabitituniz.pdfIn PDF document text
    • http://francescasciortino.it/userfiles/files/24152634284.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/76572862806.pdfIn PDF document text
    • https://securitydm.com/slicice/file/nalipa.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/1685730440.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f80c617425c29e4fa2e5486857e8d4bd/97533143321.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613131920805f---69976692371.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133fdfb054d6---xowobajelitanaboludunij.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/26844961468.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/gigifapeguveneruzaf.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ce842914a256539606dd9aeb579425ea/39918511271.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/33916152000.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210907050158.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/guladakuzevelikeletijag.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/janikixijibaw.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gipadirenewamatopuloravix.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/52326575776.pdfIn PDF document text
    • https://eliteplacementagency.com/uploads/files/rovafodasejoxawa.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/76274952579.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=wcc3+game+download+for+pcPDF 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_off0000e104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 10856 bytes
SHA-256: f58fca38342f48e830c4febf86cee0c79b28616440d077882a44335a070643b8
font_01_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 18152 bytes
SHA-256: dd4418ff67cf3d86d2aff99fcdf0aa8d1bf855ee1d3c203d63ddc9360d90af0b
font_02_sfnt_off000128d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1