Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a540b41839626c…

MALICIOUS

PDF

70.9 KB Created: 2021-06-10 20:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 748f4e5c96b257d48e4b1d96e1cf591d SHA-1: 07b89cc2f717c30254621f828c8f7578a3fa79b9 SHA-256: 93a540b41839626c4eb2fe602c8cf1c571c03f9a33f2fd446c2607511e7526f3
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into visiting it for malicious purposes. The document body, though heavily obfuscated, contains text related to '3gp mobile movies telugu 2021', suggesting a lure to attract victims.

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://ketchas.ru/pbw?utm_term=3gp+mobile+movies+telugu+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fcd9d6d10faa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369511/normal_60087db746749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5fe953ce32ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_602fc04788376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_600b15105eaf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491155/normal_6027e54a2925d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_6009e0bea806e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5fee038e42c28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_604d8dd83b286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6048d4df4d4ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_6015e6bc8f5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_605da0872b085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_604b9b83c4e71.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/5f031c55-a00d-4d84-9883-8913dfa82444/gazorox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b87cafc-5a42-48bf-b6df-b9deec24cad9/54541358111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649a67f5-574c-4ace-97bb-f8709aed2b8c/tipovudelegud.pdfIn PDF document text
    • http://lijunew.pbworks.com/w/file/fetch/144754641/19360293206.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/f/ejercicios_resueltos_de_fsica_sobre_trabajo_y_energa.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/como_agua_para_chocolate_english_translation_chapter_2.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/xafaxezoxavepopafagaxoz.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_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 5428 bytes
SHA-256: 1815aefdc53ea92a751e222d0358d9f66d538531fb3507467b49e1c9f5dfe4fa
font_01_sfnt_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 10684 bytes
SHA-256: 5597d1a7d99235b9afd7d5b0db8dab660aa64c8908cf8ae8173b92dde17b721c

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