Malicious PDF — malware analysis report

Static analysis result for SHA-256 f990856ca126fc55…

MALICIOUS

PDF

73.7 KB Created: 2021-03-01 10:06:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 84076ef83a0e6d4ff2cc1819edd4c0a2 SHA-1: 85bdbbef4cfd04c85a16c05ed0eea07e8d05bf0e SHA-256: f990856ca126fc556c283a568f1a768789a0eb25372aaad2d22dda23090d6fbe
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=cyberpower+pc+back+fan+not+working PDF link annotation
    • http://dezlice.ru/easy_piano_love_songs_sheet_music_freerfpfu.pdfIn PDF document text
    • http://rte-ita.fun/10509901138o8pnr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_602be25b732a1.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/69c6c1df0.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/lufenetizalozag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374847/normal_5ff7ebabddd37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368984/normal_6035c3bb949ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382639/normal_5fdd984119b76.pdfIn PDF document text
    • http://mutugupepu.iblogger.org/lateral_thinking_image_puzzles_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_6020b046cdc56.pdfIn PDF document text
    • http://slimitalia.space/30828451298tk2no.pdfIn PDF document text
    • http://igcopyrightclient.com/set_up_voicemail_verizon_androidsphz9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://batogejupimole.rf.gd/sobifebesixazuviletaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/agreement_of_sale_format_in_hyderabad.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/babcock_and_wilcox_boiler.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_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 5276 bytes
SHA-256: c12ca745ad3376826585d56a7c70131c8b84939e86ac62d4a7fc0006c7e91193
font_01_sfnt_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 10412 bytes
SHA-256: bb9e5829fff9cc22cf5df81500d22c2878958db77d84f4c9bed1540c830dc1bc