Malicious PDF — malware analysis report

Static analysis result for SHA-256 434da8b58e9fe8d4…

MALICIOUS

PDF

70.7 KB Created: 2021-02-23 21:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c0561533ffb60930a7676e969a4ffc7c SHA-1: 75088674af0c16be561c630e39bc19f1b6d77844 SHA-256: 434da8b58e9fe8d41ecee24a2935375c436fcbe83b1aa77471b007d4a1e9fb58
192 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=glogpedia+http+%252F%252Fedu.glogster.com%252Fglogpedia In PDF document text
    • http://vivadoctor.ru/is_the_lying_game_on_netflix_2020zfz3v.pdfIn PDF document text
    • http://gonzo-3d.com/cafe_brunelli_menullzkn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449014/normal_5ff1c0c58c00c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489422/normal_5fdc2c14376d9.pdfIn PDF document text
    • http://capridigi.com/547959646yev6k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_60251325ed960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392453/normal_5fe032872d2c5.pdfIn PDF document text
    • http://hookup753.fun/15508366970bhqc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_60206f829a9d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5fc9ce4b62a23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5fd5fd8d0551a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_601c67bde3611.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/g6LhjIR/dwayne_johnson_workout_wallpaper.pdfIn PDF document text
    • http://ighelperscenter.com/sap_lsmw_stepsr6eu7.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/fiayyFU/12240007397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_60019f51e78c5.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_off0000d702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 5588 bytes
SHA-256: 298c5e64488d696a1f789a8beced8bac57584e695ffec4b4f8f278f71dcb0914
font_01_sfnt_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 10444 bytes
SHA-256: d60ce6073c46f63f13f7885401ba064cc13f53b7ee8fffd272e1453059b95693