Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c798d033cd67e06…

MALICIOUS

PDF

79.9 KB Created: 2021-02-06 04:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 138fc6b94b4f048e5ebf55c9e31a6628 SHA-1: 90debde381cda2f151b5af4bde9934c70eb7ef8a SHA-256: 8c798d033cd67e064dd989e675ad8c096d76b9cebab63b035666a05c90bc9527
184 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
  • 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://yafferge.ru/123?utm_term=a+love+to+last+june+12th In PDF document text
    • http://bridgecommerce.com/botuxubuxolibuf99zq5.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/Efljajf/thai_alphabet_practice_sheets.pdfIn PDF document text
    • http://kudezixajuxuni.66ghz.com/44463559582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_601c6398ba9dc.pdfIn PDF document text
    • https://cdn.sqhk.co/sufipuxifemo/iggXhjx/54005676969.pdfIn PDF document text
    • http://tonagruz.ru/magonagoreduwirasutos8dfn5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_601501c1091f4.pdfIn PDF document text
    • http://iceteas.space/the_dragon_manualwzr6z.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/jVihoqB/88125711499.pdfIn PDF document text
    • http://lidzadva.xyz/download_game_zgirls_2_last_one_mod_apkuao1z.pdfIn PDF document text
    • http://bcpzonasegura10beta-viabcp.com/73586035263j2m90.pdfIn PDF document text
    • http://zanartcc.net/lapugisivawubagez07tr4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5fd11d6340986.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/jw3gljj/control_game_color_banding.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/jdngcFs/wizened_antonyms_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/jgoigXQ/11773129815.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwoguki.epizy.com/manifesting_abundance_guided_meditation.pdfIn PDF document text
    • http://pokatutabojew.rf.gd/wrong_turn_8_tamil_movie_free.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_off0000fdb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB6 4988 bytes
SHA-256: eff38c6ee2e639b842adb112fdbce0c3439972d5e927889f8cb4ce56a2816c38
font_01_sfnt_off00010ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBC 10668 bytes
SHA-256: 47343142e4b02b67b136900047a51d83868e5d873fb0ecfa501ceaaaec7d89f5