Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e35837947e9dcb…

MALICIOUS

PDF

100.7 KB Created: 2021-01-11 09:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 638d8f4c2b52b06be91ee3f4426ccfe9 SHA-1: b0375e6e5dad7e85aeda9e613c571a0861546fe6 SHA-256: a2e35837947e9dcb6be769579ea823929c737597e92cae505f31ca43427a2a47
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/aws?utm_term=android+adb+devices+ubuntu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409813/normal_5ff4b71c095db.pdfIn PDF document text
    • https://cdn.sqhk.co/bivadudit/ThcgkMF/sujobugojiwedogew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_5f99bd652d5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5fb868e716ee1.pdfIn PDF document text
    • https://site-1237262.mozfiles.com/files/1237262/financial_reporting_analyst_salary_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408707/normal_5ff08ce1b2e8b.pdfIn PDF document text
    • https://site-1167950.mozfiles.com/files/1167950/zigolafu.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/vesubodufisi/filupapajiremex.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/1659676015.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/83107779652.pdfIn PDF document text
    • https://s3.amazonaws.com/medetopuwofetut/mozepuj.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_off00014862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14862 5088 bytes
SHA-256: 3a9bd9e15c82850da2355e41b49d20eb1da8381be36abd9e1fb055ecc59c58bd
font_01_sfnt_off000159c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C3 12400 bytes
SHA-256: d2da398aa3d898b3a30e91b9ce6c9d59ddcd17c3e5e8cab7005b5a2fef1685c3

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