Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0bd82d8fb98e7e…

MALICIOUS

PDF

66.2 KB Created: 2020-11-23 17:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 139112bc47a7b2bbbbda9a4cedb50c89 SHA-1: 95c45113f4b09fa9337a8d373d2619777744d655 SHA-256: 9a0bd82d8fb98e7ed11bb724aee72ce40887bc7a8f08d32ca018ec7a46839519
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=stickpage+unblocked+at+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f8717ccdb368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_5fa39430ae836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_5f94ea711d263.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/negonanopix/alphabetical_order_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/cetyl_alcohol_msds.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/acls_provider_manual_2017_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ace6d4-aed9-4b56-aa8a-efc180fd024f/cracking_the_coding_interview_8t.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/rabbit_hutches_for_sale_outdoor.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/certificate_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/phases_of_curriculum_development_process.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_off0000c369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC369 5548 bytes
SHA-256: 429e27863318bbec05668b0d53b6273cc561f4ea9a66f2aa85eab76b3669ed0b
font_01_sfnt_off0000d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 11232 bytes
SHA-256: 5f581e7757e841b4e29e81ccfa2337d9b89016b3bbfc153d76658848e388af07

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