Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7c86377d07f1e0…

MALICIOUS

PDF

67.8 KB Created: 2021-03-02 21:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e1d16f116fbb1714141b01e86e675d33 SHA-1: db3b95c27d82e21338a3c12ac4969a17872fff5a SHA-256: 8b7c86377d07f1e03820fd77afdbac19054ac5204a32b079bc28bb7917e00d9c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=paul+krugman+and+robin+wells+macroeconomics+in+modules+4th+edition+macmillan+2019 PDF link annotation
    • http://usersdeviceprotectionservice.site/dunodsoxok.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/gjzjbib/movies_like_the_king_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/jdhhGtU/lilonixekoresitapikoki.pdfIn PDF document text
    • http://bossyonlinex.com/pink_panther_piano_sheet_music08xgf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388405/normal_5ff451ea7677b.pdfIn PDF document text
    • https://cdn.sqhk.co/wifavizen/iaiitKT/finukupufa.pdfIn PDF document text
    • http://mstmail.space/29924650779hwbip.pdfIn PDF document text
    • https://cdn.sqhk.co/nupepewomaxu/iisKggz/pinball_battlers_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/nidimejuzu/ghghmif/line_segment_geometry_real_life_example.pdfIn PDF document text
    • http://nubuweso.iblogger.org/cateye_micro_wireless_manual_mc100w.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/wukara/94069134530.pdfIn PDF document text
    • http://bilunijo.epizy.com/27384889563.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/lithermans_limited_misguided_angel.pdfIn PDF document text
    • http://detekoxinusogux.epizy.com/uc_browser_uc_browser_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/naruwinesikelolokel.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_off0000c901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC901 6220 bytes
SHA-256: 0167f64609aecb39a67fcaca3a22b5c288ca3e0b2bd11288309af641eb5276f5
font_01_sfnt_off0000de19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE19 10376 bytes
SHA-256: 49eed5ff7d53feea49345c5f123be808d69b757239afe37a09ab4fc1c3564ab7