Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df3405e07e3eae2…

MALICIOUS

PDF

81.5 KB Created: 2021-01-20 10:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: db7ed454a2f27a2aea3047d4df978f63 SHA-1: ecc9726707ee433da64331c902c8472755ec6674 SHA-256: 3df3405e07e3eae293aa9e36aa5c29c5a37e4615797c67f5b22d376842e711b7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=parques+publicos+bogota In PDF document text
    • https://dubevatuw.weebly.com/uploads/1/3/0/9/130969539/gosejudirodoreligopa.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/nejef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465702/normal_5ffd8581f3f51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_5fad20cd4fe42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485162/normal_5ff23f667c2ac.pdfIn PDF document text
    • https://site-1254502.mozfiles.com/files/1254502/miserable_at_best_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402297/normal_600260b86fc9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5fbcac472029e.pdfIn PDF document text
    • https://site-1223179.mozfiles.com/files/1223179/kadonutigemirezewovujizig.pdfIn PDF document text
    • https://site-1175728.mozfiles.com/files/1175728/bihar_board_registration_form_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/76368784238.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/ximimisidowozesikajuwoxej.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/ncert_class_10_biology_notes.pdfIn PDF document text
    • http://fojamemu.epizy.com/windows_7_loader_application.pdfIn PDF document text
    • http://finuzajobozosom.epizy.com/aortitis_treatment_guidelines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 5368 bytes
SHA-256: 6b2d22cb1c3ce5f573bec60f02ac41c7364f23380ffbb6279599428746ab71f7
font_01_sfnt_off00011228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11228 11536 bytes
SHA-256: bde2d863fa2004efa79c5262ea6a2e3e8917b5267b35983fce2ca86e27df33c1