Malicious PDF — malware analysis report

Static analysis result for SHA-256 284623a6fcd5a855…

MALICIOUS

PDF

69.7 KB Created: 2020-11-18 00:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f8390a1ecbf2ed6d0d97ea98acc1d041 SHA-1: 6d554d3f7d499838fa11b89f4962c86f491c4058 SHA-256: 284623a6fcd5a855b6b0b4feedff0fb0cfd881f5da002422eddc0a01d34ef356
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL likely serves as a lure to download a second-stage payload or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gettraff.ru/123?utm_term=generac+generator+troubleshooting+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451228/normal_5fa0b426128da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f9832404c347.pdfIn PDF document text
    • https://rewodudifizaba.weebly.com/uploads/1/3/4/4/134475466/tigigazuripol.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/jenofikekon.pdfIn PDF document text
    • https://nimomobef.weebly.com/uploads/1/3/4/4/134458394/8541301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8cb9a6edb9b.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/datarofapakil/64466939436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e120b3f-d16c-48d8-a8d9-420a5abd6d0b/26174529866.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_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 5384 bytes
SHA-256: 6e254539f31129a07643c8c293fbfdf6d8b9700490e5d508d7f0bc6d5814efa5
font_01_sfnt_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 9916 bytes
SHA-256: d00dad0ae3a954be6e742f09667bbf3fb79e3664bff16159379ff5e1657b5387

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