Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91dd42d2c067107…

MALICIOUS

PDF

71.1 KB Created: 2020-12-21 04:54:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9d07c0327f4ecdca90249784dc5be897 SHA-1: 954e06c7a2e1f0cebd37296e44cef814a38aabd8 SHA-256: f91dd42d2c067107604025bbf36078c62947fb1c4611d665506db58fe93833a0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a common phishing lure, likely leading 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://traffking.ru/strik?utm_term=parenting+tips+for+teenage+parents PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420924/normal_5fcee73d5b269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f92a888c4874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472491/normal_5fc0bf407a339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_5fa5b66ca5950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500001/normal_5fb99aa5c7006.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a79e6e-03bc-49f1-b1cc-3436fe71e4dd/rebel_xt_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1d3136-b6ad-4690-a4b9-93742c93d162/nyc_doe_stars_classroom_legacy.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/cuales_son_los_agentes_economicos.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/dj_bongo_mix_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a9cb847-d6c0-4699-a80f-4a8fa0e64b30/asbury_elementary_school_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ab6343-3932-42cb-b8b4-495552753e5a/88614987967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f69966e2-5943-4438-841a-fcf9805abf53/taylormade_burner_plus_irons_release_date.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_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 5040 bytes
SHA-256: 57f5bc29a62c8b33e1f979549c01dc0adc05864172dd740459a60cae8e839e12
font_01_sfnt_off0000ecd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 10380 bytes
SHA-256: ec1a22e1df7c98bcb0ee046a78f432ef043aca6a14b2f7f0d17f26c9d34ff085