Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdba978bb73de693…

MALICIOUS

PDF

66.1 KB Created: 2020-12-04 05:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f4699616d0780e04970ff1976473588a SHA-1: d20d39ad2bae4b0a2450f565e0d57b35208090dd SHA-256: fdba978bb73de693df014e9b62364319c93ef7590224d76bdac54dbbeec06f86
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name indicating it's a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a malicious site.

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://trafftec.ru/strik?utm_term=little+friends+daycare+and+learning+center PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417656/normal_5fc98468487f8.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/babuxufarizuxur/wei_li_acupuncture.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/humira_medication_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8829d1cb-325c-4ea7-ae14-edac8768de57/questions_about_siddhartha.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/luna_nueva_septiembre_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581324af-8197-4141-84f4-17b6d8da37c2/61904806557.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/90773622385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0e4140-8ab9-47fd-8516-748b8b0293a7/dubisexapadilixilagebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28acdeb5-3b42-4b8d-8142-d78c4e7b4b88/66647036349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe9fb64-dece-4cb7-91d8-dffb0e2db8bc/traductor_ingles_espanol_gratis_babylon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5bd0bae-d26c-4b2c-be9a-fcb780f74559/wupisaj.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/creating_multi_row_tables_in_latex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5ff961-2017-4075-aeb2-e7a69afbc30a/13522484976.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_off0000c594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC594 5232 bytes
SHA-256: d945e716c9a33cd0cf94f513a9e000fc6fed0810da34fb28c82fb996f126792b
font_01_sfnt_off0000d77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77E 10864 bytes
SHA-256: b6009df365fe0cfef8a24b3eaf4db50d8de15904237cdb5a95e7b27687bf0a64

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