Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b47ddc2d8148c2c…

MALICIOUS

PDF

77.7 KB Created: 2021-05-30 22:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 856960bfa412d5e2157eb19093a4110e SHA-1: 750d06ef01948d1a3e89b7f775458d063e0f6fcc SHA-256: 3b47ddc2d8148c2ceb255449475d239c9b3ce1cae2001e695b2c5d31cf6c258f
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=arduino+ultrasonic+sensor+led+project PDF link annotation
    • https://xexomogaju.weebly.com/uploads/1/3/1/4/131438449/vonulosa_fapizunewe.pdfIn PDF document text
    • https://toxujubew.weebly.com/uploads/1/3/1/4/131437446/4960734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485695/normal_601b9af94a13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_602d9ffe41c03.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/miboz.pdfIn PDF document text
    • https://menuwenuxunok.weebly.com/uploads/1/3/4/6/134682317/d660fb4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4454421/normal_60b0924e1c682.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/1556043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457604/normal_606cab806eced.pdfIn PDF document text
    • https://xupatoxavivuni.weebly.com/uploads/1/3/4/6/134615471/a9d357e6eaffd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426424/normal_6052e9d071d18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/09085365-3a45-4a45-a44c-623eade1441e/puvunidexekoxuvegozibiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e806c00-ca5a-4224-9832-60e7930c1a88/82488162693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a70a1a9a-d786-42f6-8ef2-301b2f26982e/alcatel_go_flip_3_reset_network_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a84731c-78a1-4b76-8c9f-72fcbb902231/after_book_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5862ad95-cd9b-42c2-a14f-5ea1847b1d15/zevopunelogisuwuwugole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96937220-2ffd-4515-8467-defa00e380f4/gofup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6052a588-b2bd-4688-b41e-83d462f09d13/wegolexozivevetipikokidak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba6503d-71ff-4b5e-b66b-1726613ce263/6703177324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a213b402-f832-4bfe-9794-26c77b1fac75/20626237335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4271315c-8ab9-46b5-82cd-7070808671da/23008851142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba685fda-2819-4fa2-a589-a5ee6548d9f5/27119351183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ab96e9-31aa-4ed1-87b2-ef6bbd2a4e37/forged_in_battle_ww2.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C7 5132 bytes
SHA-256: addbc509844a9bfdc1be37de7eb7d2aad94b668ad658b6f42a9eb7c96365eaf4
font_01_sfnt_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 2148 bytes
SHA-256: 18344d426500c921e4707c564cd1b5d7ebd12f69fd88e5f488d034333e83a779
font_02_sfnt_off0000ef04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF04 10420 bytes
SHA-256: 280480d242f958ca3ccf2eb4e3d4d95603c6d03eaaaa7e3e3b02a118df60d235
font_03_sfnt_off000112d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D7 16336 bytes
SHA-256: b1f5ea7eb6df56fdc2a0c8d605c92c3a2ccbbe74327d2aac8c0510abb85ec908