Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5271f10b60245a6…

MALICIOUS

PDF

64.1 KB Created: 2020-12-28 06:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3827626f0b6a78f9d2503f202ddb8da1 SHA-1: 98ca961025750c15b0baa8ddff0a5a35c19091a7 SHA-256: f5271f10b60245a6b5d3c73a01fe87b4887c6b91a5d61ca7a05dcfb0be107ab4
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 disguised as a comic strip maker app. This URL is likely used for phishing or to deliver a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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/strik?utm_term=cartoon+comic+strip+maker+app PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417429/normal_5fc8973d6cb0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489834/normal_5fdbeae731124.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419633/normal_5fc4139207dbc.pdfIn PDF document text
    • https://ziwarojuwetupo.weebly.com/uploads/1/3/4/3/134343479/muvekakubaxodemezi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fc5a0ae8ee02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5fe0d0993f983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_5fcbf6ad1d5bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_5fad2966ddea7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447270/normal_5fc8639a59726.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/a05525c2-ac22-4ac7-a7bc-f6006a13acf0/ruvabukorupuzu.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_off0000bfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE2 5016 bytes
SHA-256: 216b557126f5ab6c8ae9966fb0510a56f36a07b04f78bf3585f197348b8861a0
font_01_sfnt_off0000d0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DD 10332 bytes
SHA-256: 5d8ef48f694ecf57020c4be97a114e890b716b9ea3b2285fa771ff771ebc1923

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