Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4edd29193264388…

MALICIOUS

PDF

64.2 KB Created: 2021-02-16 05:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2f4ff685691a6621fdcd7fe4c0210fd8 SHA-1: 325c856449271ca2435dabab5cb94fb99212807b SHA-256: b4edd291932643886ebfc467b169a8efdaa654eee816e3ddd9e0cf70d6825a00
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crophysi.ru/wix?keyword=portable+hotspot+apk In PDF document text
    • http://birjand.design/guxomunipopanezezadaku1w2sb.pdfIn PDF document text
    • http://itali-big.space/field_and_stream_1871_gun_safe_manualtt36r.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/hh43kgc/shadow_fight_full_movie.pdfIn PDF document text
    • http://medicinfo.online/baked_cod_recipes_no_lemonf9c0n.pdfIn PDF document text
    • http://popuboloza.22web.org/access_a_ride_application_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/ligazupevu/iniddCx/53056739148.pdfIn PDF document text
    • http://stnold.com/11066434682tdeal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368964/normal_5fcfe7c73e26b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5fdfa38870f6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385631/normal_5fef185c3f19f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazokidewuwi.rf.gd/alcatel_one_touch_7040a_flash_file.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/58226912250.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/simple_punctuation_exercises_with_answers.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_off0000bbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFC 5112 bytes
SHA-256: 584592dfe1a6f6d21f9530eaab12c12731beb80ab554cb4ba6062816e20914e4
font_01_sfnt_off0000cd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4D 11592 bytes
SHA-256: 7ba039f4eb6aa1304ba01f548a1d485cc9ccd889e3f201345541994aefe42ba7