Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cea16c1f93d6a5…

MALICIOUS

PDF

73.5 KB Created: 2021-07-03 03:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 015a9bfbe68cfd0233e3b0427821f834 SHA-1: 04f7dc0a10a0dfba8c1b602272444ecfdf84567d SHA-256: 42cea16c1f93d6a5cf549618888e45cffe3728d4fb8abed631b996153c411b15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and disposable domains. The presence of external URIs and link farm characteristics suggests the primary goal is to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=yards+to+tonnes PDF link annotation
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/602f80c3nuvlocgnvcjm9tc8sr/32770352307.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ob1rj41t36fugrfunoesv9jl2q/80463864726.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863f458fc6a---29533173501.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/10f35833220e5fe9de123afb2e3dd3b2/21887824349.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/u3isiac85ur3d55m1893q23gs2/waloruno.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16083bdc1949fc---7194267189.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/fc4a2b45b132523b9f727c4ef71fd069/20190106335.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00b766edb---norurikuravizaxosefimafak.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/zuwutodakuwu.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/jetezijadoxomozawuvid.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a12c8ac5f89fb2f0f903cb7e3d27451a/lubaxisenasewifupadoxeja.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/xopuwagimakok.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160775825a07f7---xisuse.pdfIn PDF document text
    • http://abnicum.com/files/file/97830698100.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb7c9f32ce---nufizujasugukenodom.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077c7d9b84ba---toxozanik.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0318c19b8---xilavibugofamupukevutet.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/wigurugifelop.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758e9e3dbec---batibuxigotubebit.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/m4u023u4et6lmtef4md7ijppll/depijevivodalifub.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/woperawosinivi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7edf4e513e---15092368794.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080736176710---zimikanebatag.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/64967916449.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b77e86aaee8---didusebufuvokisarij.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_off0000bfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 16432 bytes
SHA-256: ae27bf34bfeebde47417ca9b4c88eebd9e57ac4bfcd4397af75d2180833d1310
font_02_sfnt_off0001025c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025C 10084 bytes
SHA-256: c32843c7c1a4bdb7910f61f50049cb896d46b4ce7f2875e5c7830d538d64953b