Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5263435d18e66da…

MALICIOUS

PDF

68.6 KB Created: 2021-01-22 05:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b7edf9c119f7319f79a87fdb7ae668e SHA-1: 9477bd890d8295e53e70be6c778819ff244cccce SHA-256: b5263435d18e66da97831f87bbd83729bee7d79316b1be2524bef1887b446c22
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jottigo.ru/wb?keyword=nasal%20cavity%20function%20as%20air%20enters PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5feff24daa9bb.pdfIn PDF document text
    • https://site-1166717.mozfiles.com/files/1166717/16990109835.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5fdd5d0540ea3.pdfIn PDF document text
    • https://site-1246938.mozfiles.com/files/1246938/67338549066.pdfIn PDF document text
    • https://site-1175739.mozfiles.com/files/1175739/dead_in_the_box_mod_apk_android_1.pdfIn PDF document text
    • https://site-1176340.mozfiles.com/files/1176340/tile_master_game_play_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421624/normal_5ffca3a9b133a.pdfIn PDF document text
    • https://site-1178057.mozfiles.com/files/1178057/the_sims_mobile_free_download_for_pc.pdfIn PDF document text
    • https://site-1194674.mozfiles.com/files/1194674/zesem.pdfIn PDF document text
    • https://site-1180155.mozfiles.com/files/1180155/jowen.pdfIn PDF document text
    • https://site-1177569.mozfiles.com/files/1177569/dragon_x_dragon_blackmod.pdfIn PDF document text
    • https://site-1177705.mozfiles.com/files/1177705/insulated_concrete_forms_construction_details.pdfIn PDF document text
    • https://site-1178662.mozfiles.com/files/1178662/components_of_the_solar_system_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todugiremo.epizy.com/free_business_letterhead_templates_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/out_of_office_message_template_business_trip.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/44894742878.pdfIn PDF document text
    • http://detuzepa.rf.gd/timeline_maker_template_word.pdfIn PDF document text
    • http://fonimegalidoxu.epizy.com/wetherspoons_children_s_menu.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_off0000d1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FE 5008 bytes
SHA-256: 348a82d17f808302dc136bf04da6c82aa2e72c5e4348fff75f23a883c3dbc3e1
font_01_sfnt_off0000e327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE327 10008 bytes
SHA-256: 86e8f4d9e4c14190ad34e44e7f3d8fdf604fba0c7ea50d7b4897fe1eff36cde7