Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17b7f38c2d26b6c…

MALICIOUS

PDF

67.2 KB Created: 2021-05-10 22:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8c7ebbd44a6460c8713de35165c8cfe1 SHA-1: 2dc1a5edc16bee1ff0f96071defc3a01f5799be7 SHA-256: d17b7f38c2d26b6cd7883fca33fae99155095ccd7b795b4ef2d198a6a76ff317
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9883

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://jottigo.ru/wb?keyword=rinnai%20propane%20heater%20filter%20light%20flashing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5fe7451da4069.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366375/normal_5fff6c39809e8.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/jeXgdie/ganesujezabego.pdfIn PDF document text
    • http://jajolamuseku.medianewsonline.com/como_hacer_una_auditoria_contable.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/jukoxisojow/becky_g_can_t_stop_dancing_song.pdfIn PDF document text
    • http://zebepireliwidoz.epizy.com/introduction_to_sociology_anthony_giddens.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/formal_clothing_online_shopping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2848907-c539-4419-b958-6601bcedbfe3/90057845241.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_off0000cacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACC 5172 bytes
SHA-256: 0fa7dc11151515358d1c46decd8fbbb839ed94e8573acb3477815556e8c58d16
font_01_sfnt_off0000dc6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6B 10492 bytes
SHA-256: 56227c98f351ca80f1b9f57d17df2359eeee50d8f32718947b16591376739b24

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