Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec7bc4feb8cbce2…

MALICIOUS

PDF

72.7 KB Created: 2020-12-23 03:04:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f7cf68465cb354c1b12b9a9256d409d SHA-1: 7a70143d803d4b2a7dc76d8e65f57239d81800e7 SHA-256: 9ec7bc4feb8cbce28a36fa1c43ed22bfe7c609fc1419020179a498f9a033fe13
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to 'trafffe.ru', which is likely used to deliver a malicious payload or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=soccer+relegation+does+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427287/normal_5fa2b6015cff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505363/normal_5fc27d8eaaa4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5fd06b053eee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f8ed79f661e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5fb6a1ca2de0c.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/tadevewuju/cheyenne_arapaho_per_capita_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c191b9-02b1-47a2-8272-78e0bf5f43f5/wow_gold_farming_guide_8.3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661b4a5b-5ca6-49c0-bcda-63826829ec3e/facebook_blueprint_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd921b1-4858-47c8-81aa-ccdc60bf5ca7/fl_studio_11_mixing_and_mastering_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/sosuleposisifogivegegok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f910217-b435-43f8-8d26-ffdb730f4dc0/nba_2k20_soundtrack_songs_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c41cd47-ba7b-4c89-a3a9-b9e3cf13bf55/things_wrong_with_americas_next_top_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c19efc0-6a24-4e1f-bbd5-beacff808b51/fanuc_manual_absolute.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_off0000d1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A0 5152 bytes
SHA-256: 063549b1383c329b563e39114184d2938f56ba34d73be38c986c264fd7025e9e
font_01_sfnt_off0000e2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EF 10876 bytes
SHA-256: 87554fdd8913236d19639d82c529037fe2631c756b16341a5547d38d28886418
font_02_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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