Malicious PDF — malware analysis report

Static analysis result for SHA-256 0252545bd918e63b…

MALICIOUS

PDF

88.2 KB Created: 2021-07-05 03:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 71b250e33e4ff751c0593a1b2b1648af SHA-1: 1ecddc50d9aae48b50197c7c344ead6edbfdbcd9 SHA-256: 0252545bd918e63b5b43edf24548b378c5ba70259535ab76b54a528277b53179
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous PDF files hosted on compromised websites, suggesting a tactic to manipulate search engine rankings or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://baatco.com/ckfinder/userfiles/files/majabejezeluwekuvop.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/544e61a71f4023d76cdd6269c9830a7e/32302928026.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/mamuwubavitemisotusi.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/vaxejenaroxebel.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/92dgi429gtsrbd7b46hhohrp03/9121310967.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087283099363---80760140613.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b6fff110b7e06dfdf28969b3cf8e7cdb/gifarojorupaloxal.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5d2d18d07---tarunewotiju.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/ec445ff894ba7054a48903bcd58f1b54/29989554842.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f317c522---59257236899.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f836cb735b---kejesukel.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b824ded77daee0ced4593ee5453b9d2d/85878787069.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/6ecd5ed66e3849c64d0c13c35221a9e7/vobodutasukozejoduped.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b62a9b7640---19276095549.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/vodisurusaduxegemezufat.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c27aabc6d50---55395583952.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/vf14famass51dip1ciqa9pasij/wonowigovuw.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/3d92f0564a8c707356248ca396ec53f3/lizajugurifijexinokifa.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/67f3cc4b71375a58acd843caf501a7b4/mixavuvofep.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/e1ac6d6bde34976082c4522c1882cb11/92747080680.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/5545f6fd970240378cb973b17c76e994/jaluxeludelimuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=crystallization+of+syrup+can+be+reduced+by+usingPDF 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_off0000f21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21B 18528 bytes
SHA-256: 00703dce70e698b07e2ae42824b69899f446b903b9995f300cb45d6618b31e9e
font_01_sfnt_off0001212a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13941 11240 bytes
SHA-256: be43942653ff9b4be8342a41b7c01c2474032bf5ef6f58e58ed5d50545d42f18

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