Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5d77ad73a5b8ce…

MALICIOUS

PDF

68.0 KB Created: 2021-01-03 03:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bde944fc7dcd19b0d4d051fae00a7e61 SHA-1: 96cb5c3f2871f162c8415b786c036bb44edd6809 SHA-256: 3d5d77ad73a5b8cee8763088604eba22b349e53df1686df9ced4e8d67ae4c67c
162 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=symmetry+drawings+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_5f90c98ed2b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381536/normal_5fa609fc5c663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462980/normal_5faebe47886ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f87f8599ff86.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/YgjbRHj/business_operations_manager_salary_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fc9fb77c824d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_5fb5cb4b281ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fc505600be21.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/d6f364d7-461f-4d2b-b86e-3664df212ec5/dnd_monster_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/32480985499.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/ethos_pathos_logos_in_advertising_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/97697675645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5847eea6-9f3b-430e-8209-50db0fa28feb/diagrama_de_instalacion_de_presuriza.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_off0000cce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE1 5628 bytes
SHA-256: 86c24d28d584642c0f2af8ed1ec7e804559dc4518b8a8e49ae470bcf4efa2b09
font_01_sfnt_off0000e00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00A 10340 bytes
SHA-256: 5475980debc3cda0d1d877ee58c7fe5d5a7843db8b6e54fa213f7e5e192dd7f8

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