Malicious PDF — malware analysis report

Static analysis result for SHA-256 91385c3be971790f…

MALICIOUS

PDF

73.4 KB Created: 2021-02-25 23:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3f30f7feca5ce54e199aea4513cec39c SHA-1: 3330cbbf9edd57710c7f6ae7451643f95fb09733 SHA-256: 91385c3be971790fa90e7d26a0ac51726b47e7010d15cdc14ac41b70c4462cd4
244 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
  • 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/wix?keyword=jurassic+world+apk+mod+2020 In PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/7051067.pdfIn PDF document text
    • http://fortysgjdk.fun/introduction_to_metamathematicsykx3o.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/Uichg3d/93855755499.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ijhdgd1/lusobusiluwitupikuxato.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/2e3e3709a.pdfIn PDF document text
    • http://fc-aromat.ru/sap_badi_implementation_guidecvy0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_6030510297573.pdfIn PDF document text
    • https://cdn.sqhk.co/notokulojow/inH4bia/pabevikawo.pdfIn PDF document text
    • http://forkidsshop.online/ayat_1000_dinar_latinimmr6.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/6hcvjaf/super_mechs_hacked_unlimited_money_and_tokens.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_5fe6894494589.pdfIn PDF document text
    • https://cdn.sqhk.co/lopovekis/hgMrihY/majegozepip.pdfIn PDF document text
    • https://cdn.sqhk.co/naxemikomeb/jaB39hh/70828943707.pdfIn PDF document text
    • https://tamoniwezetiro.weebly.com/uploads/1/3/5/9/135961995/8222466154e02.pdfIn PDF document text
    • https://cdn.sqhk.co/rubogomuweme/jcjgZhi/fear_the_walking_dead_season_5_episode_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503390/normal_60076e33c85aa.pdfIn PDF document text
    • https://tenogamux.weebly.com/uploads/1/3/2/6/132681545/kutebaxoteses.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/byiagjs/jefepisujipapaxinef.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_off0000e17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17B 5640 bytes
SHA-256: c39ad939eb8c6201bfe78520866b03829744e4ca8e20139f2f687a828c68b3bd
font_01_sfnt_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 10532 bytes
SHA-256: c7c0ea512e406d494e612b85ea5aa858f917e6b5e1c7b900173acb87cd3e6c48

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