Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e7a7a8f84d0a87…

MALICIOUS

PDF

67.5 KB Created: 2020-11-22 18:36:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a86be8859d5dc5a12826566aca28dfc7 SHA-1: c33bef7d1d0eb312a4aa795ec94427850bb99450 SHA-256: 72e7a7a8f84d0a8728db7b546de63b3720b9fcbe0cfab02b8525efa53aec5eb7
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the link farm heuristic suggest the document's primary purpose is to direct users to potentially harmful content, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=cognitive+dissonance+theory+pdf In PDF document text
    • https://netiwixavono.weebly.com/uploads/1/3/4/3/134306625/7985782.pdfIn PDF document text
    • https://janokapaw.weebly.com/uploads/1/3/4/3/134329878/2608329.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/bimitugele.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/ef8bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_5fb7c7eb10f58.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/df0e3d0a-ed29-4810-9a36-19b802de7e21/divinity_original_sin_enhanced_edition_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3346f9f6-ed9e-4dcb-839a-94ceebd5f614/5146308195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7135b9-b08f-43c0-bc5e-d85e292fae55/83607760745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf38e763-2306-4ba8-8216-c1ad892a8b1a/manual_de_manejo_higienico_de_los_alimentos_distintivo_h.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa5a576-96cf-415a-bb72-84ebd0e02162/nazi_hunters_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68baa90-0a9a-459c-8596-3c68f295475f/zobifisogofutixilosi.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_off0000cf1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1D 5452 bytes
SHA-256: 694b5778e3d50faf6d37c45956e509f7470a95591d6c0bdac2bbfa2fa36c4768
font_01_sfnt_off0000e1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B4 9176 bytes
SHA-256: 43f1d3bd6af3922268ab946091efc1b8c74f452809714229805ed1d7654be9ad

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