Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53b88a2877565bd…

MALICIOUS

PDF

69.4 KB Created: 2020-12-17 17:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 06ab02b31eab6c39964501bd4f7a7c94 SHA-1: 192b259893f9215132982d671abb68c8c336d33a SHA-256: a53b88a2877565bd7d9b88405509f877db7a035559d8c637c5a48c1e2f044c39
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious URL, which is a strong indicator of a phishing or malicious content delivery attempt. The ML classifier and ClamAV detection further support the malicious nature of this file. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing purposes.

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://trafffe.ru/strik?utm_term=monster+energy+fridge+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fae8b09a3e9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_5fb65e4c145c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0f24c403f5353fd95fd42/t/5fca77a7ad93297fcf023e1d/1607104423921/free_rider_hd_unblocked_at_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc56254ec917750a3f5a40f/t/5fcf9648b8233e30dfb1534c/1607439944827/texas_speed_motors_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce4abc06af1e3f448d5686/t/5fd6ca9dd654060362d8176d/1607912095212/electrons_in_atoms_5._3_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73d1621-b175-4578-a7d7-0a826748763d/nixon_outsider_tide_watch_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c425b5e-5bf6-4fa0-a4e6-9c50bf48836e/tupuxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162ffba3-1786-4bc6-8977-b6568c3d870f/jomad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d029a0-8020-4338-b633-601f38b0c7c8/79107932787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e003fb6-03eb-4a10-bd73-968eabbd6d2e/jedaxixiwokof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce5f902ebf7d3ac6464c08/t/5fcfe25c03de0e1408d9f0bd/1607459420995/xmeye_free_download_for_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8847f535-d7e9-4c6d-bb8b-0583056c441b/xowesojemusevigimula.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_off0000d012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD012 5188 bytes
SHA-256: 8030db465ef22f9a99631f012b63bf00a909b404190b22724f63de846e0348ff
font_01_sfnt_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 10960 bytes
SHA-256: f64a379bfcdd98d399e8c74fb6ce9af08b68e5d05c037ccf054b67753c43e1ff

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