Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e27e86fb3e1b0fb…

MALICIOUS

PDF

77.5 KB Created: 2021-02-28 17:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 68249b85209992f385bb9b8baf1a67f0 SHA-1: d8ccde7e404955312ec9715f5f0d8598607812dd SHA-256: 9e27e86fb3e1b0fb2e9adf1919978fa72bed277c1be87bf115ea9762fa6e92e9
96 Risk Score

Malware Insights

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

The file is identified 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://kuzutuzo.ru/award?keyword=plc+fuzzy+logic+controller+pdf, suggesting a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the presence of PDF_URI and EMBEDDED_URL heuristics points towards the file's function as a lure to external malicious resources.

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://kuzutuzo.ru/award?keyword=plc+fuzzy+logic+controller+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455185/normal_6002820840317.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/rafitunutuzatalog.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/bfgeIKU/treasure_hunt_movie_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fe1ec698e1f7.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/ZNjgp8R/dragon_king_menu_fountain.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/hfHwjiO/fishing_break_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/iuOhfYw/86574690977.pdfIn PDF document text
    • http://jotaradade.iblogger.org/babbel_free_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5fc9680223186.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/djclicS/xanomotisiwivisavev.pdfIn PDF document text
    • http://lijamerogavex.iblogger.org/76927448635.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lekozuni.epizy.com/agriculture_supervisor_result_2019.pdfIn PDF document text
    • http://refewebol.epizy.com/xazunodikiditope.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_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 5088 bytes
SHA-256: f7b26beb6424ae1deeb9b2aaa2f65a855effc634fb5fb110c3e077975a4e1ce4
font_01_sfnt_off000103c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 10964 bytes
SHA-256: 60015665f4ab16c8847c080b48660d9a6cac41d79bc6a89a030c6d3c47b930e3