Malicious PDF — malware analysis report

Static analysis result for SHA-256 307ece6d02abbe5a…

MALICIOUS

PDF

67.6 KB Created: 2021-01-26 19:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0dee5136f6f693f5cd0b54a885b7c395 SHA-1: 3e336c9a3df92eb270d5516119e1697e31d37f1b SHA-256: 307ece6d02abbe5a4053b992b9b69ba267b588782f97863bb763e6fed66077d4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, including one pointing to 'jacksth.ru', suggests a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with a malicious document designed to redirect users to a compromised site.

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/123?utm_term=paramount+kia+asheville+staff PDF link annotation
    • http://liolika-rsya.ru/dreamette_jacksonville_beachkflpa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427097/normal_6001efbf41594.pdfIn PDF document text
    • http://kulinarny.site/what_time_are_the_championship_football_games_tomorrowdlfxv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404497/normal_5fd7de8a3b8b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366022/normal_5feb7eb9703d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372072/normal_5fed10f6a4358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fcb5c1b3cf64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369336/normal_5ffd065202619.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5ffdaef7c568c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5fda49c0ef0d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5ff93627e5700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fe2bdeca7147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fdc054e2c6e4.pdfIn PDF document text
    • http://antonioita.fun/spaceflex_rocket_company_mod_apk87qfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fd27d8bee9bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473618/normal_5fc71dcd8a202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374535/normal_60037950e2120.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445868/normal_5febceaf2d767.pdfIn PDF document text
    • http://pasendapp.online/13807777132z2wpv.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_off0000cdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC8 5132 bytes
SHA-256: 737ad6d79a1dc70d93262be7d809919871224d273857de7492cbaba0ebafc44a
font_01_sfnt_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 10052 bytes
SHA-256: 98f9953f66c972b5490b7e1b2c1723ccab0b13b9b7093d93e6c3d86d9182843c

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