Malicious PDF — malware analysis report

Static analysis result for SHA-256 977fc82d88841f66…

MALICIOUS

PDF

90.7 KB Created: 2021-02-12 18:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c47ec3456513b7dbbfd676effaed0fc9 SHA-1: cd2588124cdd6bc6cbf206590a5542bc99b680ad SHA-256: 977fc82d88841f66e7e746819478a245a8ab01e3c78287ce5ab7ac7f4cebb8ce
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'jacksth.ru', which is presented as a commuter rail service. Numerous other suspicious URLs are also present, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure and embedded URIs strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/123?utm_term=boston+to+worcester+commuter+rail PDF link annotation
    • https://cdn.sqhk.co/ruwonumatag/ajg2Ngg/korijovinodujivax.pdfIn PDF document text
    • http://hookup671.site/48315328827r28n2.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/cKjjjhg/pba_pro_bowling_game_nintendo_switch.pdfIn PDF document text
    • http://raicen.com/variable_costing_unit_product_cost_calculatorx65fw.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/UieQiad/65049051024.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/gwZLigK/learn_painting_and_drawing_online_free.pdfIn PDF document text
    • http://ryursew.space/space_fighter_games_for_pc_free_download9zjvu.pdfIn PDF document text
    • http://prostotit.site/mcafee_antivirus_i_have_key4aewd.pdfIn PDF document text
    • https://cdn.sqhk.co/lijedubejop/hcUT6jj/kanto_yu2_speakers_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/ejjQibH/trailer_star_wars_battlefront_3.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/ggdBjde/41018079624.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/Ujj1ihc/yellow_pages_book_2020.pdfIn PDF document text
    • http://hhizmet.com/coraline_graphic_novel_online3l810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/falevi/chevrolet_cruze_2015_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/transformers_5_autobots_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/95274596176.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/sopudijipu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FE 4968 bytes
SHA-256: 9930204ecc60ebcbefdcdce1881ac514c157383de30e1baa5040152bd4e28c74
font_01_sfnt_off000126d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D2 11580 bytes
SHA-256: 44a73acaaca1acd62e957a5ea4bd97f732ea7c085b40ed9ac33bf25f3858c846
font_02_sfnt_off00014e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E29 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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