Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddaebc81efb6353…

MALICIOUS

PDF

67.2 KB Created: 2020-12-22 09:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e1db43bbd7699e9e157d34c694c0b8f9 SHA-1: d2d25deede27a37aaec40c0cb25c93d19f3e7089 SHA-256: cddaebc81efb63539e73c066e97f50265ab5cf04bb22ab1771e39cef1ad8c194
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to search terms, suggesting a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=used+bmx+race+bikes+for+sale+australia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407062/normal_5fdc0ea09b288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447097/normal_5fcc7e833fbc2.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/tobojelusiwi/loligo.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/20921065590.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c6032e34347c70505203/t/5fc43e409ee0f32b87da8c48/1606696516019/vuvifupibi.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/how_to_stop_bad_language_in_toddlers.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/77531056263.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf147494f25741fd4b8a60/t/5fd1830e133bcb3b8895b7bc/1607566094718/43574162725.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/navigating_between_screens_react_native_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/41543156507.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/46228866145.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_off0000c90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90D 5428 bytes
SHA-256: d9ceef9e339724d738cf49cdd29dc97598ba3d5998dc1f2172967656c7922174
font_01_sfnt_off0000db76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB76 10640 bytes
SHA-256: 3056f8422cc2f820ae2f1ac0e4408fadb8842e6ff8e3dbaeb947a60b006b2823

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