Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbef00946c2bdcdd…

MALICIOUS

PDF

75.3 KB Created: 2021-03-21 03:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 257a1c41fc743c7f5082ead14e39a7e3 SHA-1: e75f91988554b9db7c9b2fedcf7fbb6944b745d2 SHA-256: fbef00946c2bdcdd01c39daa9185c8c8c93a208b35127c41c6a9143427dd9210
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'vilenefex.ru', which is likely part of the phishing lure. The document body, though heavily obfuscated, suggests a theme related to aviation charts, which is used to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=how+to+read+jeppesen+ifr+charts PDF link annotation
    • http://wobafobigo.mywebcommunity.org/how_to_add_beta_in_word.pdfIn PDF document text
    • http://retamos.mygamesonline.org/relative_pronoun_worksheets_6th_grade.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/bokexizometun/velasok.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/8894865438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d61052cd-88c1-4f4e-9cce-7a2b6913f631/what_is_the_difference_between_oracle_12c_and_19c.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/what_was_the_1987_stock_market_crash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ef4769-a65e-43b1-abdf-986c9ad88c77/rarupurinoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81d2d60-bdad-4818-9ce2-2829fd0a5a9b/45567566070.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/15259214119.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/fedex_drop_off_locations_downtown_los_angeles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07423cba-f8be-49aa-ac1f-af0fdd51592b/sumuzusikojokejorurox.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/adobe_premiere_crashing_on_startup.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/states_of_matter_concept_map_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62709daa-d6d7-45d1-a1d5-0e35f03e630f/93473885094.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/67784968801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bd61dc-a950-45a8-848e-c788c0f866d1/how_to_connect_my_motorola_bluetooth_headset.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/ohio_common_core_standards_ela_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4727088e-e591-4d04-a19f-3c49b280b3d5/robin_hood_foundation_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/98470086346.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_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 5340 bytes
SHA-256: 4107b8c1f62fe079f68253deaa87c2c1884e1f43083b7a912482ee00f3ec5bb1
font_01_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 10212 bytes
SHA-256: 44626cbc1638569471e18f0c8bef22315a7e1a952594886becc937ad5dbb9d45

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