Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba4859075a26270…

MALICIOUS

PDF

72.8 KB Created: 2021-01-14 16:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e306bb0c40465f8e644051ffdb818447 SHA-1: cdb191585f3f6ef8ff397f8911b9db84e21ad274 SHA-256: 4ba4859075a262700c30b2b2b5947834ecc88877b536092d5d62bbe999d48871
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource.

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
  • 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://traffnew.ru/123?utm_term=bjp4+self-check+2.21+count2+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392666/normal_5fe308e83d451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366004/normal_5ff4c0c770e27.pdfIn PDF document text
    • https://site-1237828.mozfiles.com/files/1237828/16206220806.pdfIn PDF document text
    • https://site-1178268.mozfiles.com/files/1178268/soviet_posters_archive.pdfIn PDF document text
    • https://site-1203447.mozfiles.com/files/1203447/9894060484.pdfIn PDF document text
    • https://site-1171534.mozfiles.com/files/1171534/79595892589.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/wolawatin/82720281063.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/43898016682.pdfIn PDF document text
    • https://s3.amazonaws.com/vezosoluvezoj/xikaxetitisufukalafiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/27662240347.pdfIn PDF document text
    • https://s3.amazonaws.com/pazaxazusa/youth_ministry_manual.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_off0000daf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF8 5720 bytes
SHA-256: 2135f07a1f8b24317d67ab39194cadafb74139bc8d8eab3a7eca6d1e65f36e9e
font_01_sfnt_off0000ee9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9B 11768 bytes
SHA-256: e99c4ef56992d02a687217237927658c1a61c2346663d6c775f52a3ac2f513a7