Malicious PDF — malware analysis report

Static analysis result for SHA-256 24145f99c6d2fe49…

MALICIOUS

PDF

111.6 KB Created: 2020-12-24 22:41:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d5343e886e6f8c44aa5dbb6784e9597a SHA-1: 34eb024275b9601f6af13e80c65ae410dcbd2f68 SHA-256: 24145f99c6d2fe496ceb16fb063a228bdcf253db5e5cfe6b4c502dc852f3d720
104 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains an embedded URL pointing to 'trafffe.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffe.ru/strik?utm_term=garena+free+fire+booyah+day+apk+only PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490375/normal_5fb0229225857.pdfIn PDF document text
    • https://cdn.sqhk.co/merodobiweve/igfJjdx/66320929941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_5fb734041c8fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447880/normal_5fa621e61d4e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fcf3f34aa518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f98be977b4b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5fe332bd71661.pdfIn PDF document text
    • https://cdn.sqhk.co/xetorexevapi/KchijaS/thrift_stores_in_manhattan_beach_ca.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/xeroguru/dryer_sheet_down_jacket.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/second_law_efficiency_of_heat_engine.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF9 5288 bytes
SHA-256: d427e42bee08c5b4df7386be224e8bc503a508e3859d66ae76e2abd053ded933
font_01_sfnt_off00015fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FED 4400 bytes
SHA-256: 41d8b7c5c53d8baf76e5fffa3d2b0bee7d9ba1a1d87abca34f76142a554c7796
font_02_sfnt_off000170e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170E5 12064 bytes
SHA-256: 42a2b457567462fef9806188e708b49149b72116aaf4061577491fb8f3e534c8
font_03_sfnt_off00019986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19986 16748 bytes
SHA-256: b9be82ecb0c24f8353d40fa9e0c761a569ecebf97c03656c11944d8d3ce350a0

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