Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dada5a0df01dd6…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 22:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4027b4aac6fedbb35f815456d05c66fb SHA-1: c407afa0895788190e2513fde5b71d454715690c SHA-256: 07dada5a0df01dd6864c1b132e94ffeaccb3f210c6bf863c079a29e6d16d2364
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being https://jacksth.ru/wix?keyword=jacobi+medical+center+medical+records, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF format and embedded URLs are commonly used to deliver malicious content or redirect users to phishing sites.

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://jacksth.ru/wix?keyword=jacobi+medical+center+medical+records PDF link annotation
    • http://gayerkan.com/name_of_teaching_methods4nalt.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/ighjbhf/next_launcher_apk_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488137/normal_5ffeb96aecf01.pdfIn PDF document text
    • http://ecoterritory.store/electrolux_silverado_deluxe_1505_manual0jh76.pdfIn PDF document text
    • http://tupuwuwegidava.22web.org/reporting_anova_results_from_spss.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_601cf3294e056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_60293e5839a4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_5ffccb9b8a1e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485149/normal_602998fcb28e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_601d2a3ac9f46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5fd048e5c4a88.pdfIn PDF document text
    • http://raifaisentapp.online/secrets_to_drawing_realistic_faceslxfbw.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/2DWMbfj/air_attack_2_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5ffe2b429bf94.pdfIn PDF document text
    • http://solapp.xyz/85192769949o6kla.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402933/normal_5fe01a7778459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000df09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF09 5216 bytes
SHA-256: 58384a8daf8d4419e378fb3024a395f68d5b710839cb042e8ba7954f8e423c9c
font_01_sfnt_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 9948 bytes
SHA-256: a72fe72124c429975e1c653ca47351a287872896c45fab63fd06ef83515e05c4

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