Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cfcd71a3fbcebc…

MALICIOUS

PDF

71.3 KB Created: 2020-11-11 13:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 284a2bbab573b39d9e084b187dceca7c SHA-1: 98bb944bc84b52c0f6874c4b02a7088d0d47f851 SHA-256: a6cfcd71a3fbcebc700e73cb3b1a0c8b2c06fa33a7b75c2b4da32b13aa330a7d
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 0.9998

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://traffking.ru/123?keyword=nba2k15+apk+for+kindle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f9841c9f0bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5f9a4a1d372fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_5faab0a475ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5fa6d3fa890ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f931fef0bb9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f9f7d51b5615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_5f91e5ac68144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f923ccc90882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8d4c6cb4d67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_5f9494d29ce00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5f9ef0e02331a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f8dc15911edd.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/03970127-1d79-4b8d-b209-9c3e6ebf7124/circulatory_system_worksheet_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a24882-c230-4548-833f-aeb694f44c07/91506092970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec95f38-9f74-4df8-82d9-7692ad0235f1/17272373997.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_off0000d6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F9 5336 bytes
SHA-256: 1ec95621ea278821c3275aee294f763489ac8d55d4b5518ebb7efceb910bc99f
font_01_sfnt_off0000e943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE943 11468 bytes
SHA-256: cd03d9e1374fdc380163723bd0c4e3e6656f4d00890c0bcd7031da8a8a1fe64b

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