Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6dd6500107a925…

MALICIOUS

PDF

73.6 KB Created: 2021-01-14 13:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 85bd243793c8385595be31c2fd2bef04 SHA-1: 97590571642e84d769984ae616006b09ab3843c7 SHA-256: 9f6dd6500107a925e7ce0367a848c8ad35e4a29722f5bc7ecbda79b8f6d7be6e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website discussing gaming performance, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the presence of an external URI and the high confidence scores suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=1080p+vs+1440p+gaming+performance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458618/normal_5fd22e3eddc2b.pdfIn PDF document text
    • https://site-1166749.mozfiles.com/files/1166749/first_4_words_of_the_declaration_of_independence.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426270/normal_5fe12a49ec90f.pdfIn PDF document text
    • https://site-1168079.mozfiles.com/files/1168079/bluestone_patio_border.pdfIn PDF document text
    • https://site-1176088.mozfiles.com/files/1176088/draughtsman_meaning_in_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5fc51f791eb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_5f9bf7d340be5.pdfIn PDF document text
    • https://cdn.sqhk.co/jisanipu/1QfucAw/93281993805.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380522/normal_5fcce3ecf31dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451353/normal_5fef41949949d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408343/normal_5ffb99c366861.pdfIn PDF document text
    • https://site-1168098.mozfiles.com/files/1168098/basic_excel_test_free.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/dowesitobuga/66708528661.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/jim_carrey_commencement_speech_painting.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/11485528245.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/infringement_of_trademark_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/5865267457.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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 5744 bytes
SHA-256: fb6c7c71ae853a4f1178c158f9bf06bd6c225ede64ea08c803229bec3083b19a
font_01_sfnt_off0000f52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF52B 10580 bytes
SHA-256: 81e9fd063fd37783208998e61a507a2a1c60b03b80ec91ae9e4bf5f2f8e7440b

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