Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f552f6d75d84f35…

MALICIOUS

PDF

72.9 KB Created: 2021-02-12 16:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6cac7cecc437e2825aef3e78758a1848 SHA-1: c7252a18edfb217f83a1891f238b1539b82fe204 SHA-256: 1f552f6d75d84f35f8f48e3c74ed6c10e3489f2c69282cc8806166f1f931aef9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wb?keyword=aircrack%20ng%20tutorial%20pdf PDF link annotation
    • http://todayit.pro/la_clinica_del_doctor_ramirez_answerslndkc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403687/normal_5fcf729610a73.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/VSKgeKk/video_editor_with_music_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486565/normal_5fdde731ceb61.pdfIn PDF document text
    • https://dubiroki.weebly.com/uploads/1/3/1/4/131483307/2144189.pdfIn PDF document text
    • http://my-favshopc.online/quantifiers_grammar_worksheetkcqwl.pdfIn PDF document text
    • https://jewutejaj.weebly.com/uploads/1/3/1/0/131070173/najuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fccfb4beee9c.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/jgdjbia/voxavonoxoxu.pdfIn PDF document text
    • http://bestplacefor.rest/photography_barbara_londonvq8p7.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/gdhiAih/13261622192.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/FhbjhcC/35562754751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedure/delhi_bus_route_map.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/chess_game_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/ballade_pour_adeline_piano_free_sheet_music.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_off0000df4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4A 5196 bytes
SHA-256: d2ea21d75b259154ffcf86d24db11901537a3645444475b28e21e7b7ab950e9e
font_01_sfnt_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 11080 bytes
SHA-256: 372355eadf5b75ff1de7212373d7b187065e5894e231874b84e49b388c05ed48