Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef165e29f962533c…

MALICIOUS

PDF

84.4 KB Created: 2021-04-17 04:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e7bde41ae5d87c83c101ac7723b59e89 SHA-1: b6abd4fe3eb9b54f46dbd20d9a5a82dd270c654f SHA-256: ef165e29f962533cbe01d23f78414f0fec2cd2b283586eb38bf99a5bb4025efb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, including one that appears to be a phishing lure related to anxiety disorder assessment. The document's structure and the presence of many disposable hosting links suggest an attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=how+to+assess+for+anxiety+disorder PDF link annotation
    • http://timecodes.net/idaho_state_hospital_northkni74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_5fd37a641e096.pdfIn PDF document text
    • https://mewofotas.weebly.com/uploads/1/3/4/5/134524455/5943179.pdfIn PDF document text
    • https://cdn.sqhk.co/lenufetimop/iiehhsn/14813363116.pdfIn PDF document text
    • http://libonox.22web.org/encyclopedia_britannica_color_full_free.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/BKHVyhj/govozitewe.pdfIn PDF document text
    • http://carishr.com/film_history_an_introduction_4th_ediohunh.pdfIn PDF document text
    • https://totapige.weebly.com/uploads/1/3/1/4/131483287/gulewigosejus.pdfIn PDF document text
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/basowutajejigijuvu.pdfIn PDF document text
    • http://hurricane1.space/mewemujufilefateralijue6033.pdfIn PDF document text
    • http://trikolor.site/hyrule_warriors_legends_download_codesvv932.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/jjCjfH9/zombie_gunner_mod_apk.pdfIn PDF document text
    • http://conicppjry.bid/7667346146083jui.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445326/normal_60069c2d57e6f.pdfIn PDF document text
    • http://maslovauto.ru/xepabosuczi0a.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/jGKjgR6/62635021181.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_600e94b984b98.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ghdeNij/best_movie_app_2019_android.pdfIn PDF document text
    • https://kigodebilak.weebly.com/uploads/1/3/5/2/135297846/6843554.pdfIn PDF document text
    • http://betflixguvenilirmi.com/jovofotj9e5q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_601e38a4011fc.pdfIn PDF document text
    • http://ig-copyrightviolation.com/philips_avent_scf287_02_electric_4-in-1_steam_steriliserfdfdf.pdfIn PDF document text
    • http://vewosanexifusip.22web.org/muzeresatatepidumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD4 5092 bytes
SHA-256: e3aabd6579acdeebea67aa81f2a2a08e8371139432189d0fddfcedeee2a0fead
font_01_sfnt_off00011c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4F 11944 bytes
SHA-256: 67a6d0a0c2e050d8258d2316bf888af035bd7279a28b12facf1410426816cc41

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