Malicious PDF — malware analysis report

Static analysis result for SHA-256 513b72cead16f44b…

MALICIOUS

PDF

83.6 KB Created: 2021-07-01 11:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9a4b138dffcdf4574d0f22dd3c5a3a32 SHA-1: 88f3128c3fe4e63f50d44791eb29545ffa171d18 SHA-256: 513b72cead16f44bf18cf1f490a78585e72115ff5530598ac44930d37cf6eea6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous links to compromised websites, suggesting it is part of a phishing or malware distribution campaign. The presence of link farms on disposable hosting and compromised CMS upload storage further indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dce135320f---59001507743.pdf In PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/gotuxesivigixirodef.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/57997200854.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/c6a7d8e2ea92b9b5627037af1ab310e9/98407109442.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/3552f3f87f0788bf1b5a40a665d47fe7/78174766201.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097f74f9c1c3---razagamefamubilonus.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/aad94eface9681c7b1085d7235e7dcff/jokexutizuvedizirexosewev.pdfIn PDF document text
    • http://matras-devison.com/upload/file/67926241291.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/nawifobevegosefadel.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/midukamupuvunawusute.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091800b3f9ba---lusaziki.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/83441270780.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091aafaf301b---nanalibelotefowa.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/d6bn9dit5cdrt23nugqkub6081/18935267433.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/dizimikexuzerujovetarine.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1a22d6a367d8413408fc00a9878d0435/1520796.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/22842048112.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082c297ea0d1---woreguzisewe.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/8698746796.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/cfgvedamm5q1vqu55ql3ci8pke/tuwibajuwe.pdfIn PDF document text
    • http://dalaichau.com/files/22518517554.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/j6hbee7201gnah983nptvguiid/bujizifuxuv.pdfIn PDF document text
    • http://ssurll.com/10sxinIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=jeevith+publications+physics+pdf+free+downloadPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/d1eb18c9fa20fb3c1e4a788f880e834c/kikilivorarufomezi.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_off0000e1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AB 11216 bytes
SHA-256: 48bd6aded3c572ccdf614dafe536f9e622cccda2623dc8cb58a5884a7721a1d6
font_01_sfnt_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CF 17224 bytes
SHA-256: 564adb9d9e5e83cdff8e93427760886dba5b2d332222fa961fcf9b445117bef4

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