Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac792da3e42f65a2…

MALICIOUS

PDF

77.0 KB Created: 2021-01-24 00:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 00bf721d79bb39b9c01396c5ef9ceff3 SHA-1: 25e54cf923dc7da074c2d91f6a01a8e5717bd21e SHA-256: ac792da3e42f65a2ce32b8f2155630759079697e59ebcec5d246eaf0670711d3
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jacksth.ru/aws?utm_term=insaniquarium+deluxe+pc+game+free PDF link annotation
    • https://cdn.sqhk.co/govazilose/hfhcsja/zedd_funny_key.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/hchagca/playstation_network_customer_service_hours.pdfIn PDF document text
    • https://site-1260633.mozfiles.com/files/1260633/cheatsheetwarroom_customizable_cheat_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/hjhijbG/gofifenavufekepobuwonizil.pdfIn PDF document text
    • https://dudulisatosix.weebly.com/uploads/1/3/1/6/131637211/mejirarenaxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_600516e124dcf.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiziluda/Njcrs3v/paper._io_unblocked_games_wtf.pdfIn PDF document text
    • https://tajixuxax.weebly.com/uploads/1/3/4/7/134751877/7607610.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/defimesebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459034/normal_5fdfdf0c09ed7.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/rarujope.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/4WXpppS/plague_inc_board_game_achievements.pdfIn PDF document text
    • https://cdn.sqhk.co/rujuwawuju/iZkf1WS/dead_city_book_2_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/volotedi/ggeCifG/wokukepo.pdfIn PDF document text
    • http://kirunag.66ghz.com/aerated_lightweight_concrete.pdfIn PDF document text
    • https://cdn.sqhk.co/xosujopi/ii4wXja/wivapoviboxorib.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/parliamentary_debate_format.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hdXpiiM/tik_tok_video_2020_dance.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_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 5608 bytes
SHA-256: 1d68bf7dc23e137f7f614496682a07d927fd40a755420703977f4d6bf6c086b0
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 10692 bytes
SHA-256: 94dca637f817f56fb1810f633cd7ce0cd4dafe4a114f78d7005d1e5c9c0d90ce

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