Malicious PDF — malware analysis report

Static analysis result for SHA-256 92ee736712d2f0ac…

MALICIOUS

PDF

71.2 KB Created: 2021-02-18 00:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 86027a7b8e75b89e190ff83e098df677 SHA-1: 2ea851507448d1018e711f39e2b54155ea28149f SHA-256: 92ee736712d2f0ac21d9bff6d9d416e5029f50eae616100cc4c11e48693d1e60
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=what+is+asq+se+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465269/normal_602bb075e9d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_601e031a24561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467581/normal_601aba66d48b1.pdfIn PDF document text
    • http://deemonatrafik.xyz/chemistry_sura_guide_download0h8v0.pdfIn PDF document text
    • http://curvepreloved.com/vedakamukatokopuvoli23rkt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_600da39a8213b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_602d936e7cbda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_5ff85d251f72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_6028676d400ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fd5f6a43388a.pdfIn PDF document text
    • http://sarhello.online/cardboard_connection_2020_topps4wb8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5fdef0c4e10dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404500/normal_6007fc46e296c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc79bc91c206.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bawulega.rf.gd/what_do_u_mean_by_indirect_development.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_off0000d776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD776 4916 bytes
SHA-256: 2b487200a4a4b8262db9018fd26b9f319e684d95aa4aca845c5f463566869e1c
font_01_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 11760 bytes
SHA-256: 5f1d2d6035042e1cfdb4899f1093befe4ebb445d9b7ebe082ba61801cc5c62ba

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