Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a20e1a3250960f4…

MALICIOUS

PDF

65.8 KB Created: 2021-02-14 09:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ada9379e1fe54cfce758eb0b017b0222 SHA-1: 2157e54f09c769317d8d5209e7891596d9e9f9d2 SHA-256: 7a20e1a3250960f4e6ae7eb291573aff1d8e6e3d2ab00e6274a851a402ed5cac
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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 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.
  • 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/wb?keyword=angry%20bird%20space%20game%20%20for%20java In PDF document text
    • https://sinekagu.weebly.com/uploads/1/3/4/8/134855021/d11c9.pdfIn PDF document text
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/7cc6e0.pdfIn PDF document text
    • http://manekobe.22web.org/bombay_velvet_full_movie_hd_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/lhgPhcg/cat6_jumper_boxes.pdfIn PDF document text
    • https://sukutunog.weebly.com/uploads/1/3/5/3/135304197/poted.pdfIn PDF document text
    • https://mubajodopiwal.weebly.com/uploads/1/3/1/4/131454521/8a7eb283b.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/xofur-nujuvogake-xukifunedado-rurenexibesa.pdfIn PDF document text
    • https://lugifepitel.weebly.com/uploads/1/3/2/7/132710690/7856657.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/tCZYijq/soxafetetajuk.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/3070177.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/iaJTxhi/9739385665.pdfIn PDF document text
    • http://tidedejix.iblogger.org/gokibefazaweputobe.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/telasebisu/shareholder_agreement_template_canada.pdfIn PDF document text
    • http://fowowoge.rf.gd/acdsee_3._1_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/gangstar_city_games_free.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_off0000c44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44B 5808 bytes
SHA-256: 71d47cb67e761b0900876434a40b6478853fb92b538f4cde927446470d1d4731
font_01_sfnt_off0000d819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD819 10036 bytes
SHA-256: 00fb4ed01f407bcbf552a3550a517ee4c2240d79ec32d335c7f6139193fdd8a9

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