Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67fd5eecba675da…

MALICIOUS

PDF

69.4 KB Created: 2020-12-17 09:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 08d6fdec1c516c0d2dc4a830025f4d94 SHA-1: 6e844fca18af6e7986bbe6a721f4ec3bf5165390 SHA-256: f67fd5eecba675da1c418e6bf9a0ed3aa64e34d78efce28c39c4065b8f4224cd
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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=usps+parcel+locker In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_5faaa524c6ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fd6fe25bfe7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466379/normal_5faabcd5a8cdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f9e58d01aa49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_5fb8bf5690edf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465559/normal_5fbf415459a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f8d4668bd611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478393/normal_5fc86dc6a0d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f96a010bb391.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc67dd2abaecd331848a494/t/5fcfab4b64290b1c3de22920/1607445323924/starlink_battle_for_atlas_starter_pack_switch_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e31e591-4ebc-4eb7-8bac-89107e140e93/descargar_libro_patria_de_fernando_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d278b9-a86c-40e6-bad4-cf30394ab256/population_of_nebraska_and_iowa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d7f711f6a419849ef1c8/t/5fc8954646ef2e08cbb97660/1606980940553/98175954732.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ef221452f90b7ff27d3c/t/5fc4db7e6457125654d47a4d/1606736766963/cold_war_democracy_vs_communism.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf57f6f3de5e49b55b7e4f/1606375416111/and_or_but_worksheets_for_grade_3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe12b7f3de5e49b52be819/1606292153529/download_iroot_apk_mirror.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_off0000d256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD256 4980 bytes
SHA-256: b1dc3f9d2a54927cb1147f23263766d7f540c149f03e00877316b4b94457f7ca
font_01_sfnt_off0000e35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35D 10896 bytes
SHA-256: 274960101e33d55437748d23f22a61129ef011fde055170ab5b0990f48f015bc

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