Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e26d61ce04a708…

MALICIOUS

PDF

70.3 KB Created: 2021-03-07 06:04:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 87642b0287db7167f2a3134ec2aa01cd SHA-1: e6b4ccf7588fe390eab64756722bc4d95fe0ef21 SHA-256: 81e26d61ce04a708ad60591d7704cae8971fa3164c4ec5e6ef8a886232e21504
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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=watch+who+made+the+potatoe+salad+movie In PDF document text
    • http://copyright-securityx.com/acorde_a9_violoby97f.pdfIn PDF document text
    • http://enots.space/vedajejouqlat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449417/normal_600df9ae4d4a2.pdfIn PDF document text
    • http://buybritishcat.com/cessna_maintenance_training_coursesumc1p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_603d325b7c327.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/1488034342.pdfIn PDF document text
    • http://fudasoba.iblogger.org/pink_floyd_dogs_piano_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481052/normal_6016a78003223.pdfIn PDF document text
    • http://13millions.store/blue_planet_world_biomes_webquest_answer_keyot211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fca793137602.pdfIn PDF document text
    • http://tomerezadix.iblogger.org/how_to_do_a_tarot_card_reading_for_beginners.pdfIn PDF document text
    • http://damvglaz0.xyz/vituzalejupuboxinadunzyco.pdfIn PDF document text
    • http://mekuwomusaxonod.22web.org/2004_ford_focus_alternator_wiring_diagram.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejegaba.atwebpages.com/bomojujeb.pdfIn PDF document text
    • http://falagiwodoki.rf.gd/electronics_and_instrumentation_engineering_books_free.pdfIn PDF document text
    • http://jolijugidepim.rf.gd/2012_ez_go_txt_service_manual.pdfIn PDF document text
    • http://wisunomimat.epizy.com/twitter_all_pictures.pdfIn PDF document text
    • http://wotimadugol.epizy.com/scientific_method_worksheet_answers_9th_grade.pdfIn PDF document text
    • http://ridimonaf.rf.gd/45804866965.pdfIn PDF document text
    • http://pomadepoxe.epizy.com/5418088941.pdfIn PDF document text
    • http://negatesuxa.epizy.com/conservation_of_linear_momentum_worksheet_answers.pdfIn PDF document text
    • http://tibobabinenan.epizy.com/11988578044.pdfIn PDF document text
    • http://sarozaxag.epizy.com/lesiwizokidemokas.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_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 5384 bytes
SHA-256: 0d353be8682e6c7b0c4ef10fa59af39d88f9e595179ff81a2d583708643805a0
font_01_sfnt_off0000e884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE884 10496 bytes
SHA-256: 7d88ffb8aa693f032d293f4e606d2ac078182ef69edfcbfd2dcc0c351bbd3deb