Malicious PDF — malware analysis report

Static analysis result for SHA-256 3541ec891d22ad7e…

MALICIOUS

PDF

118.4 KB Created: 2020-11-28 05:25:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9349f0c5e96435b5d2c3da1653b2c7f6 SHA-1: d7b4c909efeb161b734a8928e6141deb7d4ec38a SHA-256: 3541ec891d22ad7e5fb369e8c2da2889721d0869d9e27ffaf6a7095cc3e44c91
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=dawson+high+school+texas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450418/normal_5fbea429bc383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f87eb4e610e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_5fa9a9681e143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_5fa5e2582d800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5fa209ffa2998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f987998078c4.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/1109b6e4-31a7-4b63-b2ea-0b9f49da7507/79706455921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf82b3d4-0175-4d5b-84dd-1051b0a66050/levantamiento_con_cinta_topografia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd9ac28-5c9e-4ad5-aec1-5c96474bd719/les_caractC3A9ristiques_du_romantisme.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/65522392350.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/49958862075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82b9a69-e18a-4245-aba0-4c09ead6d89b/zopuluvapifonekereg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4771795-2c50-4999-b7fc-b1969bb4f12f/96573985877.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_off00019518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19518 5124 bytes
SHA-256: d3fb225cd7a3b55a38a0f83b332cf5fc3aabbf6a63d00d07d55c85c388fe7250
font_01_sfnt_off0001a6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6AE 11120 bytes
SHA-256: 44fef26f22afce40f74b787d1f8f9619232a9719f7d75a96403cab9caafb86b6

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