Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8b1ad142a13e600…

MALICIOUS

PDF

72.6 KB Created: 2021-02-06 02:09:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 34964322dfd8aa3d215c01082e8a60c3 SHA-1: cdfc5dc962c09a351954167c78ebe29b927726f6 SHA-256: f8b1ad142a13e600963dcd9ac80c6e3de4678ab23656246fa6cd0e5df7ebbe7a
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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/123?utm_term=riddle+school+5+walkthrough+in+words In PDF document text
    • https://cdn.sqhk.co/fiporalisu/mgf6ghi/crushed_diamond_furniture_wholesale_china.pdfIn PDF document text
    • http://deutschebank-meine.com/4_bedroom_bungalow_house_plans_in_ugandafb48n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420934/normal_5fcc2a2157e5c.pdfIn PDF document text
    • http://rerolakareruxom.22web.org/metastasis_adalah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_600275fb02f64.pdfIn PDF document text
    • https://cdn.sqhk.co/zivunegas/ihjjihj/ates_ve_su_2_oyununu_indir.pdfIn PDF document text
    • http://zahlungsservice-ch.site/52164031699f46an.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/9426796021c7sgd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_60148a77b4a2b.pdfIn PDF document text
    • http://e-devletodeme.net/rc_high_speed_racing_boatz64bd.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/4hcibb1/8165937768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445889/normal_5ff02c9dab8ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_600a44a8e1a55.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/eiKighf/61044551877.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/jolituzoji/bovonimavirevobuzekaza.pdfIn PDF document text
    • http://lolukojalima.epizy.com/powerpoint_templates_free_2018_finance.pdfIn PDF document text
    • http://topadut.epizy.com/39701938802.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/vidmate_hd_video_2018_pc.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_off0000de71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE71 5488 bytes
SHA-256: 24f790d29529acb22c24cd1962c272162a8a8f690c813c497e9e562b7286fbe8
font_01_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 10552 bytes
SHA-256: 412db706ee16e73c7df0bc723ce749c26d9a35ba3e5591d3fcea94fff3dc6e43

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