Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5468a3c0ce55ba9…

MALICIOUS

PDF

126.5 KB Created: 2020-12-17 20:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ebcf81944098dc428e80973c49e05023 SHA-1: 901bbe353e88322fec99401abe21be8900f6c208 SHA-256: b5468a3c0ce55ba98a5d46ecd52306fd4a5e12750ff43e29c2ae92dadecea223
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. An external URI, 'https://traffnew.ru/123?utm_term=what+is+not+an+academic+source', was embedded within the document, suggesting it is used to redirect the user to a malicious site. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL and the high confidence scores from security tools strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=what+is+not+an+academic+source PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fc18574347f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fc06987744ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414695/normal_5fcb47ff9dc3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5fc33569019d4.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/adf201c4-2a21-4468-9787-1fa807fef5c2/15955055602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a89373a-8f56-4c16-b53d-8d37ad5bc13c/nakevolewaxubepajapumuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9b9e51-d7c4-4ad4-bd0b-660ca72ee0d7/football_manager_2016_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/emotionally_immature_parents_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/naa_autograph_telugu_film_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6e6b68-af1d-42c6-9128-ff634f2a988c/silk_road_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc2af2efa04221c7177ccb5/1606594351450/wolfgang_puck_pressure_cooker_manual_bpcrm040.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d10f9c-85a5-4827-897e-384d62064e78/gazurigoneg.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/83688658207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a087ec2c-1094-4b6b-8a4f-673d90846ea3/jubituradodosi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2973917e7202640f4fd6f/t/5fc516a1145a8629dc528f9e/1606751906176/vozozexopoboxipu.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_off0001b624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B624 5160 bytes
SHA-256: b7082f0c82dfc01f4035a67ff1aa2fcff5f051a07160f359037d8244b6c82af6
font_01_sfnt_off0001c788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C788 10888 bytes
SHA-256: 6a9764fdc384887dfb0334ba293cce2b3d61821022643edbd7ea891609dd1f59

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