Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacb19095b8b679c…

MALICIOUS

PDF

70.6 KB Created: 2020-12-01 22:50:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7930268e4a37a4b702e8eda65b01dbde SHA-1: 40c8a8f1d1a233b7b461c8631e5379a7b62946d1 SHA-256: dacb19095b8b679c6b8be579e4f9855c8dd087ecf6ad549f55d9e71f068b1ec5
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 phishing attempt. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of the lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with a phishing attack.

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://trafftec.ru/wb?keyword=conowingo%20reservoir%20fishing%20report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374181/normal_5f9be6438d9a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393356/normal_5fc4437e812a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427274/normal_5f9ad810d7942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_5fbc214f1a31b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f918018ae84f.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/76ed3738-7b7b-4c77-aa95-eebfc6d55a9c/timogakozibexisedimuporo.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/wugit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c1ea0da-d3f2-49c4-a307-145e5c20437b/su_kaynaklar_mhendisliC.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1d81509-1ddd-485c-8c2f-9a89d0f7b5fe/personality_plus_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/macgregor_venture_21_sailboat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfcb7b7ee8e70759e9c28/1606220984377/nozemaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a75986-5339-4e62-8650-ecb605a9ded6/33862142979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f35c32d-76aa-435f-8292-b71eec996bdc/teste_psicologico_desenho_arvore_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/medadele/grammaire_franaise_universitaire.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_off0000db78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB78 4976 bytes
SHA-256: 8eb9dd4a605779ff080499db274f5cea2bf8606c3c0f7a8c19909b2436f5c0e0
font_01_sfnt_off0000ec81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC81 9676 bytes
SHA-256: c622e1a556b1117866f427e46ab7105f6f6e22041a3279ba0d048550a28857cf

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