Malicious PDF — malware analysis report

Static analysis result for SHA-256 952cc449e52c032b…

MALICIOUS

PDF

74.3 KB Created: 2021-02-15 20:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5809cbe129f4e21ef6aa1915a471d9cb SHA-1: ed0ee530c3b5f49682498539991f79e5cb8f6cd1 SHA-256: 952cc449e52c032ba9fb6b7562a54558603054e8d501e42f3bcfe3de2961b11a
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=how%20to%20teach%20stop%20and%20jot In PDF document text
    • https://pulakaxumif.weebly.com/uploads/1/3/0/7/130776647/josopedevedegib-wiponogezajewef-sagaxul-sumiwifide.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/iihdVaa/gun_rider_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/bDigShf/jemasivomonowiteno.pdfIn PDF document text
    • https://bododomeliba.weebly.com/uploads/1/3/1/4/131408614/04de42e9614f.pdfIn PDF document text
    • https://nezopubetuw.weebly.com/uploads/1/3/2/6/132681339/mobunevifo-gafalatefatuxi-liwofexasaku.pdfIn PDF document text
    • https://cdn.sqhk.co/sivofedexim/jihdjii/car_simulator_2_hack_apk_mod_download.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/2dd035.pdfIn PDF document text
    • http://vosukotobula.22web.org/ziwomatifonopi.pdfIn PDF document text
    • https://ligiponofejejo.weebly.com/uploads/1/3/4/3/134346234/jawexer.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/5040965.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://paxubar.rf.gd/duxofunuludofarobesoj.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/26838819464.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/roxidojuv.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/world_population_data_sheet_2017.pdfIn PDF document text
    • http://mojogisi.epizy.com/lasawubiguzizufopev.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_off0000e509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 5164 bytes
SHA-256: a244cb0b6c43d8457ff79a93ecf27f2eea04ca0809319b14088b1f99502c8329
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 10624 bytes
SHA-256: 593bc7c9c5ae204baa939a3f1ae6901a91dbf7ec748c4c36dbbb206c729a731a

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