Malicious PDF — malware analysis report

Static analysis result for SHA-256 84429c99f35d66d3…

MALICIOUS

PDF

101.9 KB Created: 2021-05-05 23:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2a695932164cc7869a049c59114edad0 SHA-1: 22dbfe167e5dd641258f4d1fe9ab6921582d8d16 SHA-256: 84429c99f35d66d3399ad16f499bde1714d591fdce239c23f1885cfbede2821f
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which are flagged as potentially malicious or unknown. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier further support its malicious nature, pointing towards a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://jumiwimov.ru/strik?utm_term=candide+voltaire+symbols PDF link annotation
    • http://medway24.com/zenogakolepifuzikolijeeyxvc.pdfIn PDF document text
    • http://negozio50sconto.info/how_to_connect_krk_rokit_5_to_focusriteyu1dn.pdfIn PDF document text
    • https://cdn.sqhk.co/xewiliwilax/UedghB0/baby_growth_calculator_app.pdfIn PDF document text
    • http://alkim.xyz/taus_machine_translation_post-_editing_guidelinesqtwqr.pdfIn PDF document text
    • http://shopsmmv.site/practical_file_index_pagec4x5t.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/BdIjahg/singular_plural_worksheet_for_class_5.pdfIn PDF document text
    • http://santand-es.com/lutusulidaponobadaguaeep7.pdfIn PDF document text
    • http://neditaxuvim.getenjoyment.net/cambridge_dictionary_pronunciation.pdfIn PDF document text
    • http://nosinoski.shop/boy_scout_personal_management_merit_badge_bookrfh66.pdfIn PDF document text
    • http://jatudoz.getenjoyment.net/architecting_secure_software_systems.pdfIn PDF document text
    • https://cdn.sqhk.co/siripeka/ig2hhce/russian_aircraft_carrier_world_war_2.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/luropi/evanescence_lithium_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/518666925.pdfIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_0a7ce4ccffef4765b8852447f8854c3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zikeko/39656997503.pdfIn PDF document text
    • http://fowakoleviwamop.onlinewebshop.net/62046365156.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_7525fa234be94bf8a28498e4d23bb3c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/kindle_3_hard_reset_paperclip.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/niwufutixofilasuxor.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_361110cf9ff64ebeb24b67499bbcf7c1.pdf?index=trueIn PDF document text
    • https://aa4de0c4-a7fb-47f6-97fe-5721705e71c1.filesusr.com/ugd/824332_dffa58dbe7f64b78b97dffe39789ca34.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B3 6304 bytes
SHA-256: 4e710319bf5b439283e537f2581638fb2929df6c85acd585d9b5dab3369eedf0
font_01_sfnt_off00014d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7E 5180 bytes
SHA-256: b52a1d988a80c2275aaf2798937bea23890ba6d0df3273425cff8bf7ac846316
font_02_sfnt_off00015f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F0A 13088 bytes
SHA-256: 4242bc16dde140bff17c20b1ef6a669e95af3a5829fd2dae6495be95a1f27ee9

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