Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc30a743e7e4d0d4…

MALICIOUS

PDF

68.9 KB Created: 2020-11-21 22:34:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0db2ab76db7f0bd86f8d83fc57c70129 SHA-1: 61f9889a402877e7d1549f5af9eed7a608a0a409 SHA-256: dc30a743e7e4d0d4c8e90d19eda9531e7ed2b05107c7722a93b1ea9785f7089b
112 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains language indicating an overdue invoice and a deadline, aligning with the 'SE_URGENCY_LURE' and 'SE_INVOICE_LURE' heuristics. The embedded URL 'https://traffnew.ru/aws?utm_term=overdue+invoice+reminder+letter+template' is the primary indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?utm_term=overdue+invoice+reminder+letter+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5f925f2109a56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_5fafa7679e585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5fb9616118188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8dba735b758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fab5f8ed6930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_5f908a8059ddd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5f8b58d8bb53f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_5f9ea6855641f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_5f91d7db64959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_5f98c365e2ae0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/5f2e6098-d9c3-4385-a84f-39b409c9f624/certified_ethical_hacker_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258ad0f9-0bea-4210-980d-1a3b98e6ef32/formatos_de_inventarios_fisicos_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b4d9cf-548d-44a6-8b23-ac841c565e96/64279162756.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B7 5008 bytes
SHA-256: 717277190efa83565254913e61da32463b005e81b2bced86d6304aac7dd6b2f1
font_01_sfnt_off0000d6a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A5 9936 bytes
SHA-256: f6b921b0584c58125449a4b9d809c23114e542bac7a173f334e71d13cbb54f8d
font_02_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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