Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3a5366a508d528…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 17:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 159f98f393a35a98deef9ceef6b45330 SHA-1: acf6162a2ebb26f3bfca2ace63f2cb1832eb06e8 SHA-256: 7c3a5366a508d5282bade48d8583b7ddfeaf6ced0fbd3620eb98e9f1423ff1a8
126 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
  • 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://leonvi.ru/aws?utm_term=is+chest+and+back+a+good+workout PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470211/normal_601072d50d910.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/82082337066.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457838/normal_5ffe2b8dc07c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446494/normal_600eadf1b5385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_60269d88260c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371788/normal_5fc71a8775961.pdfIn PDF document text
    • http://mabisujolaman.iblogger.org/rodosux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479691/normal_6004e9cdd21d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_600e5f95b6b46.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/where_to_buy_wahl.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/what_is_nash_equilibrium_example.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/lukerowudulabefob.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/what_is_ms_word_format_resume.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/how_to_reset_a_tracfone_voicemail.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/how_to_apply_decals_to_a_motorcycle.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_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 5404 bytes
SHA-256: d9ca37c12c0564d6e63b33e018de5636c6bdacd4e6118a138db91fc8ddc1dc4d
font_01_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 10168 bytes
SHA-256: 1e892afe20c604891e4bf4ae43d94645ad2f7342d0fb757a4a6a23734d7cb41b