Malicious PDF — malware analysis report

Static analysis result for SHA-256 1633ae7578a63eb2…

MALICIOUS

PDF

69.5 KB Created: 2021-02-16 03:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1d03afd27ac9f108d752825dcb842140 SHA-1: a8a1a9dcc5b1f16c9705c818e94d97899965a1f5 SHA-256: 1633ae7578a63eb29921c04368aff19e0ea35cfe3fcdf0934c25eca4be37ffe7
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=elder+scrolls+blades+apk+android PDF link annotation
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/1294b89d6a.pdfIn PDF document text
    • http://mazanaposiwos.iblogger.org/cxc_chemistry_past_papers_2017_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/lakuxezaj/IXhh1hg/ny_stock_exchange_close_today.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/Siggjkf/link_apple_health_app_to_discovery.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/gerhgjf/3d_maze_game_adventures.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/5yicFvv/hashtag_get_likes_and_followers_for_instagram_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/a9Nih63/fadivudu.pdfIn PDF document text
    • http://herss.space/cambridge_audio_dacmagic_100_androidq4lp0.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/fijvHjc/simple_pure_soap_for_sensitive_skin_ingredients.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwuwigo/Vdijnrd/67466318367.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/juIGigG/38527636642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teworubinogo.epizy.com/nekenemopevokuxasu.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/sounan_desu_ka_episode_4.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/death_note_netflix_movie_parents_guide.pdfIn PDF document text
    • http://tavubemafixa.rf.gd/too_vs_enough_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/73902833396.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/85327860744.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_off0000d431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 5228 bytes
SHA-256: 5633113b7d0edc22dcee10aeb43c287231c04f0ca828abf19be5b31a024f0996
font_01_sfnt_off0000e607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE607 10092 bytes
SHA-256: 50a9cc310013f1703368f4ed7afd4e6c276561ff7eb358172c3b14ecac9a4836