Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2ae1a4aa4feb8e…

MALICIOUS

PDF

72.1 KB Created: 2020-12-11 09:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 01d0b06b2cd30235526105b69bd46eea SHA-1: 98083b2f51db56ea6c3483696c11b18969db60b9 SHA-256: 7b2ae1a4aa4feb8eea632498c15b813a6642ff4a604f6bd34aa01f15bb750e6d
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=artefactos%2528+obra+de+nicanor+parra+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5fc180bd351e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa2fbf6af86c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8fef89cc2a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426260/normal_5fb87f1199c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_5fa545eb8dd79.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/mesixadelomomo/39948667976.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc537ce3398ff75154a1c50/t/5fc60ffc3570fb44d1d25806/1606815740556/luwun.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/abc_biology_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/ccna_7_chapter_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/41128917466.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/kirkpatrick_model.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/tolelemolenesadukotopo.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/65371521315.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/britannia_unchained.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/tukozeb.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_off0000d8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E3 5324 bytes
SHA-256: 9817083ee04e55c616347295b90f043e9076fd8462867836f6233245d6ea0d20
font_01_sfnt_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 11820 bytes
SHA-256: 1bed724d90a7da46fca23b4106e4d040a86fec454ecfb9f089f10d7a195cec30

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