Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb8b9769aca2665…

MALICIOUS

PDF

70.4 KB Created: 2020-11-29 00:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 24167c9711070b00d0589484246d1da4 SHA-1: 162d0d865706b27fd9d02d0d16d00ccece4d2c49 SHA-256: bbb8b9769aca2665fe84e93615ccf3341d9cfa97f47663269a456fb8db7d4e3e
96 Risk Score

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://trafffe.ru/123?utm_term=julius+caesar+act+4+test PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495240/normal_5fada24a8deed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374859/normal_5f9869e2747e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f912003657a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424011/normal_5fa1eab18a170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5fa9974e31f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f876225444f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/24280b2e-7607-4c1f-9d40-0e5c14a03943/29832738392.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/nationwide_platforms_contact_email.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/52203346236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72514062-b7a7-4275-8395-86bc68878c6c/pijizifiku.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/2950486866.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/pa_driving_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/vocabulary_worksheet_grade_6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC40 4536 bytes
SHA-256: ba7ff15163e8395d6bc5bbbb9afd088af8658c5ee6e35ef0fe3823bc632947be
font_01_sfnt_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 10248 bytes
SHA-256: 58f68d26ad2b9ad39d83c9cd226802ac6470e05e7152c5611e000e8137985a1d
font_02_sfnt_off0000fecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c