Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21a65eab80df4c4…

MALICIOUS

PDF

104.1 KB Created: 2020-12-06 16:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cb548a8f10e03f397f273987ba14dd1e SHA-1: da074fd3aa2a1c2b62c4a5b0551c51e8d77f0bb3 SHA-256: e21a65eab80df4c4079fb4e1cf7c3dba2b85c59d0c940767d785d41491beef73
154 Risk Score

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 0.9997

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://cctraff.ru/123?utm_term=que+es+un+estandarte+en+la+biblia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5fc0cd31e39b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370097/normal_5fc4371a9d839.pdfIn PDF document text
    • https://lopuxewununoj.weebly.com/uploads/1/3/4/7/134748711/bbd421f577f7.pdfIn PDF document text
    • https://rowagikej.weebly.com/uploads/1/3/4/6/134678960/8999846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_5fae4f18e0248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_5fb44fef55e92.pdfIn PDF document text
    • https://sirefofaf.weebly.com/uploads/1/3/4/5/134523631/jogikir_vezuretin_nakuneritokexi_taritapakivepol.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/5fc0e844cd1e280355d45049/t/5fc0f75d2dd96f591811e65b/1606481757950/50615314308.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17bf5104edf1d7784f42e/t/5fc5d80a9d7936484057de86/1606801418805/58939844609.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dcb55e-06e6-429b-8c8d-deae5a269493/lose_the_heat_unblocked_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc284356609fd0ee79ba959/t/5fcb7df09d29b56e4d0304b5/1607171570031/3685434870.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_off000159c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159C8 5020 bytes
SHA-256: f55f15b97de5a3e0295d9f815553290b65f8126746f74a5ec05b1f6722b3b0c4
font_01_sfnt_off00016ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AD8 11980 bytes
SHA-256: 1b2f1bb6bc26cba318a512740ff868ea5c94e5ee244993116e89746f8b01e13b