Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fd36ae511f824b…

MALICIOUS

PDF

70.1 KB Created: 2020-11-20 19:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4645e3d0d3723158b6831c0f3e2ef868 SHA-1: 1569cdb00aa3f002485f5d94e68b0c63f39ba81f SHA-256: d8fd36ae511f824b8b9a2417bd91a4702b654b0fa4ddfb519985c4c58dc233b0
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 0.9996

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?utm_term=summit+county+auditor+property+map PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f8e51f604776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404528/normal_5f928d8feabc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_5faa469d9c5c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f935af3aaa73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5f8e2dc08cfd2.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/d1c302ca-e608-4146-be97-c6540bfdae79/how_much_is_a_pint_in_fluid_ounces.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/98611448995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b22d6d4-4677-4956-88b7-9bf5fb2612f3/monelo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/1721136402.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bdo_life_skills_tiers.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_off0000d198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD198 5212 bytes
SHA-256: 695ad8bc681fe15b7ed3c47332d74618c0135cb76e04e8d3a70c464d863e4a59
font_01_sfnt_off0000e349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE349 11332 bytes
SHA-256: 92936fd63c799168d8cdfdcf85524178438398d202a2a9db135f402d195fcc79

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