Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df9fe66b60a09c4…

MALICIOUS

PDF

62.5 KB Created: 2020-11-20 06:50:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 49422e7ba529becb8ad6714f3d8eb2fb SHA-1: d6619df1c1def35e03523f4afc8731832a196bdf SHA-256: 4df9fe66b60a09c4dd1f2831fc6917fab65870fe4a6691169ac000cfb0fa644c
96 Risk Score

Malware Insights

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

The PDF file is classified as malicious by a machine learning model and ClamAV, and contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to an instruction manual. The presence of embedded artifacts and the overall structure indicate a phishing attempt designed to redirect users to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/strik?utm_term=instruction+manual+for+whirlpool+ref PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f8c86954a9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_5fafdf6e9ebc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f923d34c6197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f8bf554e337d.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/wilugugo/nemitotoduvutuxabexa.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/98822019388.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/logic_games_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/what_is_additive_inverse_of_a_fraction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1559cc31-2f93-4061-b83e-6c9c3013002e/morphemic_analysis_resources.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/compass_group_plc_annual_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/46980951899.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/bidoboguta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415d6291-6b7b-4d99-adb7-f476adfaf561/vpn_master_application.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/brat_diet_patient_handout.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_off0000b839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB839 5284 bytes
SHA-256: eca62441c763965752cc823204f366eca899452751e9becedf9bedd09b90c332
font_01_sfnt_off0000ca17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA17 10128 bytes
SHA-256: 8cfda681a014f1183023ab519bfb64ca75a3cc6a03cf4878b1a85f5aad903d18

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