Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3619b54d6beae3…

MALICIOUS

PDF

84.5 KB Created: 2020-11-16 13:11:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 23cf029015519958b4f403dd6544f060 SHA-1: dfb52ee754ec393aa0490382de930051d9ef8782 SHA-256: 4f3619b54d6beae3369c1eb03a863c96e598a7549efc53cd8cedc8b63f1e238c
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 0.9995

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://trafficel.ru/123?utm_term=the+worst+hard+time+chapter+6+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f875cc9aff54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_5fa8d714c2eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492259/normal_5fb255b7e7e50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9a24cc443df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_5faa277881a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422367/normal_5fb254fe0a343.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_5fa9ea3711e9c.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/juliziwojatige/mypay_dfas_login_access.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/navy_special_request_chit_for_bah_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/pewoxutado.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_off00010ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC7 5576 bytes
SHA-256: 543202361018e1c35f58e4eb828977c9376889fc89f6837ee7d522e3093fd9db
font_01_sfnt_off000121a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A9 10384 bytes
SHA-256: aa333f4e5b0a236bc5842d1827c1cca400e54901bfcaf6a785c2196c4fc32b27

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