Malicious PDF — malware analysis report

Static analysis result for SHA-256 7665b4b68925cbd8…

MALICIOUS

PDF

147.8 KB Created: 2020-11-16 13:42:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2a6f22e2799982420f712a06aeeed5a1 SHA-1: 36eec170b383577eae39a4624b453f652db4f67c SHA-256: 7665b4b68925cbd83664e6a07b379642ab2e5e264e8d9c5f8d4d462ed60021bf
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of phishing or malicious redirection. The ML classifier and ClamAV detection further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to lead the user to a malicious site, likely for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/strik?utm_term=el+poder+de+la+imagen+publica+gordoa+pdf PDF link annotation
    • https://wiworixoso.weebly.com/uploads/1/3/4/3/134321663/lesoxejawepifo.pdfIn PDF document text
    • https://wanexopoxada.weebly.com/uploads/1/3/4/7/134704754/97a65b364e1c.pdfIn PDF document text
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/4313952.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/56b8c445-1492-4568-8153-0603f917ff02/macroeconomics_articles_2015_supply_and_demand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2381e3-3a9e-48c6-8989-52e62680d27e/endogamia_y_exogamia_biologia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a33cb0-b557-484b-97ac-b60ecc6df203/73975600239.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d24df30-1e42-4b12-8035-5ecf3d89dc05/59424894843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a942e0e0-336e-4822-a042-095cf5470417/14399253111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c31fa5be-ccd3-4233-8826-a8b526f56ff4/83399969356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e78f9a-6a98-4982-bf55-9d88cef3d44b/bejuzajosogudesevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555a99cf-8a42-4bb4-81f4-efc15732fd16/free_grade_9_reading_comprehension_w.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf99a0fc-5710-4fda-8167-f33b654b4b24/pupipogevavibife.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_off00020574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20574 5396 bytes
SHA-256: b92ddaebd9486affe1f0ac5dda0f66257b72bd1f0a6a30f256f16740ecd47f6f
font_01_sfnt_off000217b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x217B9 13296 bytes
SHA-256: 9dbf30d2743ee41553a899e387b5ad9cdfe07663a9eaa147b65fd4a463a20aa7

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