Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59df29dd234616f…

MALICIOUS

PDF

67.1 KB Created: 2020-11-30 20:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2d3be91e2b34c3c23a3499fefedc4d82 SHA-1: 3f5ea3d92d0e201aae83970da8efbe2625410c6f SHA-256: a59df29dd234616f2e75b614c7be8134463f46c552bff25d9c7ac04e17db7de4
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is associated with distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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
  • 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://traffine.ru/aws?utm_term=extremecopy+pro+serial+key+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_5fb7e3909b154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fbbada83dd24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_5fa7610270834.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/delonuzubut_roziwosodode_ximugepetetule_pifanunuzakole.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/warokujejiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366964/normal_5f8efba1dc162.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/pekavel-jegejebepuwaki-zijamemikepizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfb119d7936484054735f/1606286101733/selobisezezaleduka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f85c450-092f-4096-be0d-182a6d1a34b6/series_sum_calculator_symbolab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dbca2e537a05ef08df7c/t/5fc19ab1f81c9a2a0cdea509/1606523570679/dragon_ball_ball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fd5004-be44-4e62-818f-6b7aad479a53/vikejek.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/period_definition_physics_circular_motion.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_off0000c967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC967 5352 bytes
SHA-256: d4864fa5ac43143c954b19232aca390fbecd1b8b8b29c04cf518134b8a828deb
font_01_sfnt_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 10652 bytes
SHA-256: 8cfedcd2163812ce3c15d06d840216d6e9c4ba8e1c32cb1ad02fe3ff73db9dc3

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