Malicious PDF — malware analysis report

Static analysis result for SHA-256 945a168f4c1110b5…

MALICIOUS

PDF

36.9 KB Created: 2020-11-04 11:13:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ca9832ddec32cf1c9ef81e17f248058 SHA-1: 227fa9a2f7da3b0fbb088609fee8d5e95c5c74d1 SHA-256: 945a168f4c1110b5104bb54fcd646a667e8b10d652fe5306a5d9d23da5cf89f8
94 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 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 1.0000

Heuristics 3

  • 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?keyword=words+that+start+with+che+in+spanish In PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/mifadogewizuremero.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/0521c67f4eb.pdfIn PDF document text
    • https://tasukivokojut.weebly.com/uploads/1/3/4/5/134592673/kubiku.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/8dc51d124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxadol/carnatic_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jidomipajanakarunewa.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/59618462163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef4d9e9a-b943-4ab8-9c55-366a5e6cb59a/jaromodupidi.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/questions_and_answers_about_edgar_allan_poe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dca7ee-95aa-49e4-a3fc-64cd5dfbb53f/83802871876.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_off00005514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 5236 bytes
SHA-256: 46bcbf37264e11cfa71b2b2280c16b9a69c28eb2eb63ed968737449563725c49
font_01_sfnt_off000066f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 9340 bytes
SHA-256: 45b05789e1cc5e6cbf96121299e620377bb3ee2404940a3c8db5790e321ee201

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