Malicious PDF — malware analysis report

Static analysis result for SHA-256 904bc7dd5f80096a…

MALICIOUS

PDF

73.8 KB Created: 2021-01-27 23:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0bc280f88f2c4678ac9cb6d072e58c3e SHA-1: 00c669923c10fbe715f2675fb083b334d7ec9cf7 SHA-256: 904bc7dd5f80096a627637008150f012bce9276fe20a7266c64f7933a55e6ac2
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://leonvi.ru/123?utm_term=learning+korean+pdf PDF link annotation
    • https://cdn.sqhk.co/xedasuzefer/xJjhico/taxi_game_2020_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_600b011f781e7.pdfIn PDF document text
    • http://francobusiness.com/rabbit_population_in_australia6zp77.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5ff5b70c7ab1d.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/gZhfEGg/32379465473.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/dUZidgg/exploration_minecraft_servers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366042/normal_5fee49d1463a1.pdfIn PDF document text
    • http://pitushok.fun/1051194117t6k8e.pdfIn PDF document text
    • http://goldstein.capital/mefuxolodulokicphm.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/Pic9gi2/raid_shadow_legends_pc_trainer.pdfIn PDF document text
    • http://table-wait.com/54614369563tla6l.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/U7gehjc/mixoxusu.pdfIn PDF document text
    • http://ontrade.top/auto_chess_piece_placementnhdy9.pdfIn PDF document text
    • http://winsbig.space/11528373306zg7qc.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/gofiguj/aadukalam_video_songs_free_in_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/81774489010.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/garbage_in_garbage_out_ielts_reading_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/xumopi.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_off0000e3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 5004 bytes
SHA-256: 6ae00517c7c6aea32909b1e6c3db5d5d44635a87acf66864082010aa8fa819bb
font_01_sfnt_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 10516 bytes
SHA-256: b4edc07ca7a352cd8937edca49bec8d2448ad0238f8309fb8169b4b0fdcc153c