Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9b0ee5ad80ebae…

MALICIOUS

PDF

69.4 KB Created: 2020-12-02 23:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 307d331c369b556026dbc150165d6674 SHA-1: 8c8e3d213500c1ae3777d662420b52e381216d62 SHA-256: ef9b0ee5ad80ebae721e8a25f8852dfdb3dfcd1a5ed4c48979dbf2296557ab11
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/wb?keyword=employee%20satisfaction%20survey%20report%20template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420248/normal_5f9d57df78a68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f9a7cc3f0241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5faa0e7e4c821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fb642698dce7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f9464daf1d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_5fbe7b0259841.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/8ed5c987-0414-4890-8c6e-9468e900fd26/somuguvolet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89f09919-f8ec-4770-b1a1-0f1a44065981/moluzaperivokemexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e48204b-a2eb-4d49-a23a-7de33fa5d03b/fixoniwerexumugidetakej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ff92b5-2b4c-45be-a2ec-03d622c05563/bowizetazif.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_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 5280 bytes
SHA-256: 70f651cd8f18c84b7fec0edc64624f04908f119f3bd9ad96b6de9dc17cc0803d
font_01_sfnt_off0000e69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69C 10060 bytes
SHA-256: aca6fac3134dab75825af11cc0510eab91a1f63d41eb549e4a7031a564233c28

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