Malicious PDF — malware analysis report

Static analysis result for SHA-256 9415750d373d7312…

MALICIOUS

PDF

74.5 KB Created: 2021-11-02 13:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 153623852d4b3c21f16ce4c848429442 SHA-1: 13635dd5923952406d4369093ed752abc8449e68 SHA-256: 9415750d373d731228623ce00d9cefd85a1963a2a44bf544afde2e93939c34ba
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for Pdf.Phishing.Trojan. The presence of embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites, suggests an attempt to redirect users to malicious content or phishing pages. The document body was unreadable, but the heuristics indicate a link farm and potential callback lure pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=standard+tender+document+for+procurement+of+services PDF link annotation
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/43punrkfs4sa9032ndhgf8ft03/61948102939.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/jofasukaniwori.pdfIn PDF document text
    • http://xn--80aadq3ae7aa5k.xn--p1ai/upload/file/xisokederefeguxun.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16151314b6723d---70978545675.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/82389860122.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/lazelipazurufafixejepe.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/63115964352.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/62097287375.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/xazepagev.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/tujugekabusaxejuvisakabos.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c30cb46c66887f9b45f63698511f14c4/77130887490.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/gowuxabatolitesutu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/gmgldbof218jhgqnejubbo7hs5/75505795662.pdfIn PDF document text
    • https://maviet.vn/upload/files/wufofurasujuvut.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/pobidoragidedim.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20211004_A69E30C66F387051.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/budeve.pdfIn PDF document text
    • http://effekt-film.de/files/file/nigenok.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/utqpgfut5b9bnvt0nufftpl6b5/66327833633.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/11314568686.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161427bcc7046d---senijaxezovepolidubeno.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_off0000be91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE91 10976 bytes
SHA-256: 4876629d088e2532d044a58d74035e87d92175317c4950da3eb317eadaa9cb9a
font_01_sfnt_off0000d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 17092 bytes
SHA-256: cfd41070d48efdd227be8e2731e4f2c8e8737a877c2b3394fa0c57c674b2741e

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