Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0e734fe3bd04dd…

MALICIOUS

PDF

100.4 KB Created: 2021-03-25 04:45:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3744d154e7fe71fcc4247a2d8b3e1cbf SHA-1: f446d8c68b372833d6e127dc3ed2a417ed7df08c SHA-256: 5f0e734fe3bd04dd73d5575a123b63c02ee5111ea7ae28c1af54b96bb4e52ae1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting or unknown domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=cowon+plenue+d2+review PDF link annotation
    • http://kartaidatodemeleri.com/zyxel_firewall_review3gvgb.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/jihBmgg/woodturning_small_projects_videos_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_5fd0ea2a2740f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_602aad97475b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5ff0179b4e28d.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/lggSjio/2048_hexagon_elimination_game.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/ghAhhhf/mermaid_princess_love_story_2050_full_movie.pdfIn PDF document text
    • http://sale20.site/xagevik404xs.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/baudrillard_simulacra_summarypwb40.pdfIn PDF document text
    • http://ital-tess.space/bosisibezobqt67.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/OjdhGgj/hyperion_launcher_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/EhfE0JF/pew_pew_shirt_disney.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/432d8f98-8166-4fe5-b20d-c72061e98111/sistemas_de_manufactura_flexible_ut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809a779f-0d46-47f3-9830-39137569d225/11451601247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2dce51-6fe5-4755-a410-2a032ae2b1ef/dajiteparoduwise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a62a7890-693f-45cc-b3df-7e59e7e5aff8/philosophy_of_social_science_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d60282be-b461-475d-af52-91c0b00c0974/python_ocr_image_to_text_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26350d54-1346-432f-8412-937faa84dc18/tamil_love_story_movies_list_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49f1b7d-6420-4269-ad21-84a68a1fb6bc/mapikenalabika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16cb151c-ae14-4a6a-b02f-f2658793bfa1/the_count_of_monte_cristo_musical_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d09724e-cab1-4ffb-b55f-23483cadc340/43215072532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89b53b18-7ebd-41d5-8354-7182b620287c/how_to_enable_bluetooth_keyboard_on_samsung_smart_tv.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_off0001493d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1493D 4756 bytes
SHA-256: 87dcb86962754b1913088b4a033001b4fcd6be87923dc50f5b9af4aa2b2af783
font_01_sfnt_off0001598e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1598E 14344 bytes
SHA-256: f2e53bff2df6e4ae6a14a1523e1139f7b794ccc8dda788e9cb3e7f58b0c538a2

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