Malicious PDF — malware analysis report

Static analysis result for SHA-256 cebcfd046d773f93…

MALICIOUS

PDF

61.1 KB Created: 2020-11-18 01:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 623c08f333c99c58c57b5f3f627bd45e SHA-1: 17b0d0da9a9f164a6e8ce0e77f0aa4e1ed9ef32b SHA-256: cebcfd046d773f9304a6ead927bf79194eb914e46c9df84bc5aa09a703f4bd9f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files with numeric or generic names, indicative of a link farm or SEO spamming technique. One prominent URL, https://trafficel.ru/strik?utm_term=the+missing+manual+access+2016, suggests a lure related to 'the missing manual access 2016'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=the+missing+manual+access+2016 PDF link annotation
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/6452872.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/miraked.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/813cf1644869f.pdfIn PDF document text
    • https://fukoxifixe.weebly.com/uploads/1/3/4/4/134460993/0fe4d8285.pdfIn PDF document text
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/guvawajixifekuzoxusu.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/5222ed37-3391-4492-a3f0-778f938a9dda/11154293585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276a04aa-6610-493a-b20e-0a3d9a1c54db/download_frp_apk_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d38711-d082-45d3-89d3-c190c3d2bfe6/rifle_data_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4bce4c-6fa5-47d2-a5e7-d9ca4604676d/visimep.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_off0000b2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2EA 5544 bytes
SHA-256: 744e29360841745cf256f6c5b9e2d2233a4f83d9f7ae600b0343317bc6de2e5c
font_01_sfnt_off0000c5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AA 10128 bytes
SHA-256: 52afbd108c06ed9d3d26fa34c4b3f43d5a5078d87db5400be52f8dad186642b8