Malicious PDF — malware analysis report

Static analysis result for SHA-256 69387757a4061e8e…

MALICIOUS

PDF

68.4 KB Created: 2021-02-23 16:24:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b11365c0084c41676e4abcd9d86b9051 SHA-1: c72aaaedec310965a0e68431c27e725dc3d37a2b SHA-256: 69387757a4061e8e683f44d12e4c95a83df7fce2928c03d9f8a2660fb2890603
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting the malicious intent.

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
  • 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/strik?utm_term=new+holland+ls180+engine+removal PDF link annotation
    • http://leopolds.space/my_dell_computer_wont_power_one0qo8.pdfIn PDF document text
    • http://znasila.ru/doom_patrol_trailer_season_15u0x8.pdfIn PDF document text
    • http://itmax.info/adventurers_league_season_8_log_sheetqo5oy.pdfIn PDF document text
    • http://vykupavto54.ru/facilities_management_budget_templates9ph0.pdfIn PDF document text
    • http://gsmall.space/maya_bay_viking_caveuae6m.pdfIn PDF document text
    • http://vorecan.space/what_does_no_mas_poquito_mean16wtc.pdfIn PDF document text
    • http://creditreportfast.info/9801113399901llr.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/ijRIich/elementalist_lux_skin_shard.pdfIn PDF document text
    • http://cuzinfo.ru/hetman_file_repair_1.1_crack_downloagwad2.pdfIn PDF document text
    • http://misstourist.info/jakawelepujarolis6kjjq.pdfIn PDF document text
    • http://reduslim-eu.site/8_characteristics_of_civilization_woqht8w.pdfIn PDF document text
    • http://pmaider.com/xaviera_hollander_freebbcit.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/mWhf4hf/mirror_cakes_game.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/ZWidjiz/wisasimuwigupewijas.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/kalanejaxutilif/46901539827.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/agile_project_management_process.pdfIn PDF document text
    • http://bovifuxabobi.epizy.com/65096278597.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_off0000cebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBD 5748 bytes
SHA-256: 90f31fc428a65bc71c4384b90077ed4ef58979ec20c237ae7b5f63bb06819a26
font_01_sfnt_off0000e246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE246 10116 bytes
SHA-256: 32cfb766978096b7dd2e025c405dbd4e4088db409efb48fa6b1ddc75bef8efb2

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