Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca97d240aef39762…

MALICIOUS

PDF

87.3 KB Created: 2020-12-20 12:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2034005fe2bbf22fa4750820cfb080e4 SHA-1: 90ad4a03c45eb9638ae8968a2b155e53764f23fa SHA-256: ca97d240aef39762f1837a66e29b6037f4bdea36949567396d3b6cddb62a8d21
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://gettraff.ru/123?utm_term=leveling+guide+classic+warrior In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5f9a0b4814aa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f8d8f7793a15.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/5fc2c8b6405d5340f335e453/t/5fcdcfc83ff1011540129cf3/1607323607686/oklahoma_natural_gas_service_area_map.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6dca4f140fc3aa585f110/t/5fcbdbeb36758319a55ef7fa/1607195627925/42645096142.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/amersham_train_timetable.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c36ae5c7695ca9b45588/t/5fca3f0ce4017829c175f5e5/1607089932803/living_on_my_own_song_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/acidosis_metabolica_hipercloremica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476c4920-1691-49ee-9b1c-3c4250d0b9ac/95996273449.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/rajusuded.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/gokowepubegudop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17bfd104edf1d7784f47d/t/5fcbad4964036b614392c138/1607183690371/fun_reading_comprehension_activities_for_middle_school.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7893fe9133927d90f6a22/t/5fc801201e4ca9148a233b91/1606943009943/xbox_one_gaming_headset_mic_not_working.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37863f59a2572d8ffde5/t/5fdd4c47459323513bb37b1d/1608338504330/juwozujapazajesekux.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_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 5200 bytes
SHA-256: f3c1bef4876a8985bef7c9da549a7f92549979c4b9b52e38fd220fefc699f8e4
font_01_sfnt_off00012915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12915 11528 bytes
SHA-256: 65e0a93b25f53a9872b12f440a7bf1cdd8b871caf0ace8aff71cde4eeafcc7b3

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