Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f6483d188fa164…

MALICIOUS

PDF

62.9 KB Created: 2020-11-25 20:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9ed46b2cdb05022b3a50694602a497fa SHA-1: e0f0d6713a76ab7601d0269986b0d483d67ec155 SHA-256: b8f6483d188fa16492a8f3275727b7100faf82f487fea8b659f1e201b4d286f9
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. An external URI was found embedded within the document, pointing to 'https://traffking.ru/strik?utm_term=coolidge+high+school+staff'. This URL is likely used to deliver a malicious payload or conduct phishing activities.

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
  • 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://traffking.ru/strik?utm_term=coolidge+high+school+staff PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f9e08d9b5e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375702/normal_5f8fa2d4adf7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fa271f8c8680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f8c0061d75af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/518e30a7-3150-4d3b-8364-2e07e3fbdf6f/wojigokesiwur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8314c4a0-ea0e-4b2d-a29b-bbacfb9ba354/66820536086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66167a8f-22f7-47fd-b31a-96250538c5a4/zedibinisuwikumetebutokuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f6cdb1-1575-4241-af92-dd48ecee63a6/75753993008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50386b07-e3cd-4980-a657-1e20025cf949/boy_pee_outside.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ea9f7f-bc20-482d-886a-3bdad6664111/55535906130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/399b1537-1829-41fa-bd7f-f887580252b6/giboz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40876f0-eaa9-4427-9a88-073408c86b3a/vugedudopifegogavovebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839850be-1228-4084-b815-e84ff00b4dbd/93316650744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3d1c5b-c689-4d3c-a02f-44aa7964c77c/jonusexoborakosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eca3e90-5b66-4508-acac-f58550e8d807/34131576389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3f0034-7c16-4362-bc6c-590fdbf5985c/best_app_to_watch_free_new_movies.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_off0000b95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB95D 5092 bytes
SHA-256: 0c4dc4518ea3a348d8fa8c7c875511426b60e0468b14fcfd12fcd25dea897899
font_01_sfnt_off0000caaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAF 10616 bytes
SHA-256: b228861387cc0de35197e4a699c467efbce6a16a199c1c79c7b471be85b336fb

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