Malicious PDF — malware analysis report

Static analysis result for SHA-256 9037a1107803ee49…

MALICIOUS

PDF

68.5 KB Created: 2020-12-19 08:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6dec4057af18043c645e85408b132f52 SHA-1: c7a3b17775ceccd8735c664035e3b0391affbd22 SHA-256: 9037a1107803ee49e76a4fa9c3f4bfd1c4260b1cb3771f3e267959729d553854
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafficel.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'smash bros characters' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafficel.ru/strik?utm_term=top+10+most+requested+smash+bros+characters PDF link annotation
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/vozetovuxukelul.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/ec3b8fd08e03311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f8970938103e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481509/normal_5fbbb7627711f.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/032f97bd-38d4-4864-a03c-50a640289708/56131970848.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/wagudunegizudono.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/endless_space_2_custom_faction_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/1649407145.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/3502947508.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/injury_incident_report.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_off0000cc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC38 5692 bytes
SHA-256: a49d79d7a2deee47db79b1ca4c857a68c9aa2671e6a96db69d29d78618dd5e5a
font_01_sfnt_off0000df65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF65 11236 bytes
SHA-256: 44d48c424ab8e9c2b5f44052e172be2e5736d30ba9b3cd6dd452e23d69acce0f

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