Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c6c27b6f2e1a88…

MALICIOUS

PDF

65.4 KB Created: 2021-01-29 01:00:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 107934ed7165907cadafa102d75ae944 SHA-1: eeff994dadc26095e0fd62d79c15ab4adf481e25 SHA-256: 08c6c27b6f2e1a88dcc675547d79c83ac19f73616107fafd1e5e7cb1aa507243
252 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wb?keyword=unnie%20oppa%20doll%20mod%20apk In PDF document text
    • https://cdn.sqhk.co/nawakema/Cwtifjd/synchrony_car_care_card_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/Viihc0O/music_player_pro_apk_2018.pdfIn PDF document text
    • https://faboduvo.weebly.com/uploads/1/3/5/3/135343103/daruruvenenekinaza.pdfIn PDF document text
    • https://cdn.sqhk.co/sisuriwul/9hf0u7n/18251888043.pdfIn PDF document text
    • http://idealica-italiauficiale.website/knight_solitaire_ps_vita_vs_3dsb9ghx.pdfIn PDF document text
    • http://proita.fun/69403667591kunia.pdfIn PDF document text
    • http://hayatevesigar.online/can_you_ride_the_ender_dragon_on_xbox1rfkf.pdfIn PDF document text
    • https://webonuru.weebly.com/uploads/1/3/1/4/131437172/lerabenidesowuxa.pdfIn PDF document text
    • https://xaweregosakub.weebly.com/uploads/1/3/1/4/131407668/jikenaburifevo.pdfIn PDF document text
    • https://cdn.sqhk.co/sojejinof/jeMjhBg/adt_pulse_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/hgdjgnh/88782605941.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/didYp7b/games_offline_free_similar_games.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/nejavisabopam_runawexazozodo.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/lerezazo/use_conditional_formatting_rules_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/dumenadulutalisezo.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_off0000c31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31F 4888 bytes
SHA-256: 2a0e9be3a0c2685e07fb8d1a8a7bbeb829adea9a3b22eb5ae0577dd9672fb206
font_01_sfnt_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 10980 bytes
SHA-256: daaacbb1baa3b06187851a75c0eb686b5771a437e054be3f0eecc4615f025913