Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ebc3531a1fb638…

MALICIOUS

PDF

74.1 KB Created: 2021-02-01 20:49:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 97a0a6cebc0bfd6c471c6a235f531d81 SHA-1: d5f12443c86c13f6a3b8fa4942cea087e8631411 SHA-256: 52ebc3531a1fb6385f5f32fd848b7b48d756607dd36bbae07d7059d415d92af0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'druttle.ru', which is likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI suggests an attempt to deliver a secondary payload or phish for credentials.

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://druttle.ru/123?utm_term=1-3-1+continuity+zone+offense PDF link annotation
    • http://zebrait.fun/pedafofonivazositotekilenwzd3g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448343/normal_5fcb77b6e3b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_600c4436b4e59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411501/normal_5ffc2bb4786b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473031/normal_5ff666b904950.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486367/normal_5fce2b517ae94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5fe22e3b18485.pdfIn PDF document text
    • https://cdn.sqhk.co/divojimo/jeVhaih/death_from_above_airborne_motto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391649/normal_6008ab39598ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5fd329a74890d.pdfIn PDF document text
    • http://hr-insider.com/temavimowerer0zavc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_5fe1f53be90c8.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jjshhhe/rugoxekidafav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_600d2d48634ae.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/jevedijadiki/disavapawejo.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/empirical_antibiotic_therapy_guidelines_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/listening_strategies_for_the_ielts_test_answer.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_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 4840 bytes
SHA-256: bec318d0b8ee8abf4e3073d88762775c04caab5877496b1a1da65ecb4047363e
font_01_sfnt_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 10792 bytes
SHA-256: d74cf80db4adbb82e32a1ebe8d55900e9239cd92955a0c81609ca4db3170ee0d

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