Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f957a8392ae1a4b…

MALICIOUS

PDF

98.2 KB Created: 2021-06-26 01:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: da7d48ad910a2da80eb43e4d60a4dbb8 SHA-1: 3f295155ed0ba06029ec944fb96f8be19e380283 SHA-256: 1f957a8392ae1a4b3115fb833346be62dfadc19ed1a6b3d0d17e937374f42a86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, directing users to potentially compromised websites. Heuristics indicate these links are hosted on disposable or compromised domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://infrive.ru/uplcv?utm_term=consumer+demographics+in+marketing PDF link annotation
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fcl3de5eg72lnfe6kqungdsqf5/dojalawawim.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ab83c2da8---73259745672.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/retowuvepuriwideb.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/feaa0dcae7cf236f73783414320c263a/tizesoferuwo.pdfIn PDF document text
    • http://jucal.es/images/file/sinosevufisutejorabinune.pdfIn PDF document text
    • http://www.asslar.de/downloads/xomulutegizu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609414b61c021---2121723020.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9ba12c0a7---51287943430.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/48787591061.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/05c4c4cd8ce72f61c38354cb1c3508cc/raziresav.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/rudexoruzoremaja.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092eac403aed---wevipukiji.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/lizedozefixanojenepow.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805b564ec5a---moxolitufanurugagelom.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/zijasilape.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zalomoxijuro.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/ecdcb6d776f14e2e676e115fefcf0323/85878903738.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69c6f46669---linuj.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/dikalasubagatozoja.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d91a5a916---nujazafowitigofefemakaz.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/gixiduwugojilezugizuvabe.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d3ffdefb8---ridejawaned.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093cbc15a5ff---89151344503.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/81489668915.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_off00011b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B05 11136 bytes
SHA-256: 2fb54e3b09851e4c7b6faad4e95d57d86177194c798dd6c347435db4e41876f5
font_01_sfnt_off000134a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A7 17784 bytes
SHA-256: a2dda4a97857efe92f2052868185bf62c24306180a3a8f8adec64389f730537c
font_02_sfnt_off0001633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1633B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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