Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5deb613c2f0970…

MALICIOUS

PDF

71.6 KB Created: 2020-11-19 22:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3d1703ca2aac3af5407271faede57ca1 SHA-1: 0623c5546c4bdb1cd5db4c6d13c9657f960a6cc7 SHA-256: 1a5deb613c2f097081ac430d029b38e7e89e9d068b8c3d39c6a94b23876229e0
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://cctraff.ru/strik?utm_term=h%25C3%25BCrriyet+ve+itilaf+f%25C4%25B1rkas%25C4%25B1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5fa50b21ad6c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447669/normal_5f9d854e01ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421466/normal_5faf3b0902d8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_5f885048a310b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_5f902ce5aebcd.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/cf86f28a-0395-42fe-aeee-3d026aebd3a5/55042365419.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/lent_in_a_bag_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49bcda63-8c21-4dca-8db8-1eef6732da76/soxutufuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c562e5-b909-489c-8fed-7727cb3ef820/ap_human_geography_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70106388-ce83-44f8-bcab-6b72e478f407/51461735243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb80a247-956a-4959-8b4f-1930fd18c9c5/pifozavonefatewomato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c9a0ea-ae5d-4052-85f4-95e5fd2b0cf2/happy_birthday_greg_funny_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c8e82f8-9dc3-4b6a-b422-a43c9911cb42/16404987907.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/94235236171.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAC 5100 bytes
SHA-256: 4d0120ea1b891bf9b68ca95d6dc53295e6def70a05c2221f41db681156cc42be
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 11712 bytes
SHA-256: 74c643e2cc82b3026224863415e2e9330e58caee4cdce7e525978a03ae0f9eb3

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