Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f3b3dc5c0a075f…

MALICIOUS

PDF

75.5 KB Created: 2021-03-20 05:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6d97311f73b437aa958fe291a4a08409 SHA-1: b67c4045075b2472b8d9e10a53155cb010571096 SHA-256: 07f3b3dc5c0a075f4ac99511f7b899308b6dd7751efb5f05716bd3f27fd4e3de
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. No scripts were extracted, but the presence of the malicious URL and the overall detection indicate a phishing or malware distribution attempt.

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://leonvi.ru/award?keyword=general+anesthesia+journal+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499942/normal_604edb62e45cf.pdfIn PDF document text
    • https://cdn.sqhk.co/rubupidorinu/jhcjjPw/14569898655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_60005c633ca1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_6012b1895da8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_6003a74c80338.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fecb69827fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_60217f43bcd4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476750/normal_5febcf44bc570.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/U6os4j1/xefifuda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5ff4ad28b0451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480889/normal_6026b1576ef33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529893/normal_60290aa2529bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453098/normal_6007008382a2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kulebosux.myartsonline.com/jifuridofevodujiwoturi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac33002a-1aed-45f3-8ce1-724ca575e77b/acer_aspire_one_cloudbook_14_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e64f3e5-d246-4f27-bcdd-dd897cce76c7/kunewofagubulozapijap.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/napiwipetegozogenejujori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94768023-6d26-4b85-ba73-fc409ef415ac/resumen_del_capitulo_11_de_la_fuerza_de_sheccid.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_off0000ec1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1F 5236 bytes
SHA-256: 72e18439733cabd13cd5cec6b24b30c26ad1218ced129cd7822a750792c4e982
font_01_sfnt_off0000fdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEC 10272 bytes
SHA-256: e9acf6459dc5d7823568c1fc9f20618ebca01319615f5aee12e5c5baeb5ae264

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