Malicious PDF — malware analysis report

Static analysis result for SHA-256 1914a456eb8842e4…

MALICIOUS

PDF

75.0 KB Created: 2020-12-26 10:04:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f467ad8c49b5036b84c0d699b762aa36 SHA-1: 095088fbf16a2cf5e2be3fc97c73a701d966f018 SHA-256: 1914a456eb8842e4cef31532a52d96871f547005e4375207e589c0479a04cd3d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafficel.ru/strik?utm_term=shake+the+monkey+game+video', is likely used to redirect the user to a phishing site or download a secondary payload. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a document.

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://trafficel.ru/strik?utm_term=shake+the+monkey+game+video PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f9e24e52f3b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459175/normal_5fbb22623d326.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5fcb02d18e053.pdfIn PDF document text
    • https://lavidibiw.weebly.com/uploads/1/3/4/5/134582964/xubadu_jowizedaxo_vopufuto_rabefonoluxad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529149/normal_5fc80833a551d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496815/normal_5fdc9c400205a.pdfIn PDF document text
    • https://cdn.sqhk.co/tizarina/ggig7ek/3d_crystal_puzzle_apple.pdfIn PDF document text
    • https://zedimubaxujejit.weebly.com/uploads/1/3/4/7/134715534/2b7cfb26292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f9a87e946292.pdfIn PDF document text
    • https://cdn.sqhk.co/pozuwifofub/S1w9kvb/footsies_rollback_edition_download.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/falufusu/chief_information_officer_in_health_care.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/46324543335.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/judumudakawiwivopalakag.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_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 5264 bytes
SHA-256: c58922702337865ba858cf839c946902f0f3f49eeddf059cf3f51ff546c56de2
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10852 bytes
SHA-256: ed8791a4e3a6edb820ac3e48ed25d99c9a4955e9794dc2838aa39d31ff300a43