Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18e278695de4e3d…

MALICIOUS

PDF

73.2 KB Created: 2021-02-28 12:14:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c6c85d469c2ea8f59440d35ba677400b SHA-1: 577ad2ce5a29f6539bad5123f39a81a6877e3494 SHA-256: c18e278695de4e3d81546c52e88cd04fa94e985c9d39340d2f2279f2a597f8c4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/wix?keyword=pandora+premium+plus+apk In PDF document text
    • http://slmit.fun/robot_framework_android_automationo9bk4.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/the_cask_of_amontillado_characterization_fortunato.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/how_to_charge_my_fitbit_flex_2.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/hiHjfL6/comedy_central_trevor_noah_clips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502236/normal_6008de9a783f9.pdfIn PDF document text
    • http://callup.today/70889418237o4gyz.pdfIn PDF document text
    • http://hookup154.site/32630624822pvp7z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499021/normal_5fd3be76a07ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372085/normal_6008381c37d62.pdfIn PDF document text
    • http://forpost-electrica.ru/the_way_of_the_peaceful_warrior_reviewhcuy5.pdfIn PDF document text
    • http://prod-fruit.space/livro_genetica_veterinaria7a9ke.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/birozovigawubarixikepo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412896/normal_5fff6e3645e3a.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_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 5172 bytes
SHA-256: 90c94c3d1764f8d72bb94ed5b3fc196b1fd2202ca52e91e7be6f57ef1a14ea94
font_01_sfnt_off0000f41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41F 10412 bytes
SHA-256: 21005999a5f99df01b406fe67604deebaed0b1f42c88e0daf186f0474c53758d