Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab636c76f37dd16…

MALICIOUS

PDF

75.7 KB Created: 2020-12-04 00:44:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3a8be5c372068ed7dda0d5ac0356ec8a SHA-1: 15e8bd14f698cba0c341751da8d8423c4d227ddd SHA-256: cab636c76f37dd16bcb158a44caa44f434af111fbc1ad2c1eead7ec3b096477a
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to the embedded URL, suggesting a lure to entice users to click the link.

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://traffset.ru/123?utm_term=wedge+tailed+eagle+predators PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fb5643c909d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422884/normal_5fb6f1ac64ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_5fb8726f79ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5fb5fc8e42488.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/fa3de763-6724-4e9e-8fba-882411ef7c7c/jedalizibitojanomuxuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e56ea4a-575b-441a-94f2-197adbfbfa36/zukowowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71383c20-b581-4ca6-8d95-e6ea40d06376/fundamentao_da_metafsica_dos_costumes_resumo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f3af1c8c741314320bf8/t/5fc259ba3c02f22b9d593229/1606572474739/92621502331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fba3d1-61f9-4d57-94be-eeac6116472c/how_many_words_in_a_paragraph_apa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad9fc62-ce8e-4de5-9107-e837ef4460dd/download_bloons_tower_defense_5_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da74e308-5458-48c8-b65b-d8f699689ca1/xenefuzafatanomar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc3e0d4-c5c4-4496-81f8-ec6dbd0caf5f/when_is_open_enrollment_over_for_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3bda9b-bf82-4c99-9df7-9c66ad47a04a/sagelitewufobemikoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e850c4f4-803b-4891-a881-279e9823e10a/34275977321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d9c7cd0-a698-4bda-8c39-97ba5bb8641f/tosepawimejiwirotomusize.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_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 5140 bytes
SHA-256: 007d740c77a77e270ecb2011bff11bc31b16a3e803fc9afb516bed0b61436672
font_01_sfnt_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 10856 bytes
SHA-256: cec57ca161ae17381c704487c5473803f3675bc0d8d99670614cfb051d0c5101

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