Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aecd701c4f15b6e…

MALICIOUS

PDF

77.0 KB Created: 2021-06-02 07:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfcef93ba8d691a6c9b9e922c69814d9 SHA-1: 7616b8394ea0372d32579810cfad19b6edb8be2e SHA-256: 1aecd701c4f15b6e016bb5a28ff2e384d4430c17ee19bd060572dd07ccef820e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, potentially for credential harvesting or further malware delivery.

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
  • 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://smidgel.ru/pbw?utm_term=the+story+of+platinum+ielts+reading+answers+pdf
    • https://static.s123-cdn-static.com/uploads/4470402/normal_600633c37bb85.pdf
    • https://cdn-cms.f-static.net/uploads/4390057/normal_603765b9c3d9c.pdf
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5fc7e8750b6a0.pdf
    • https://cdn-cms.f-static.net/uploads/4379852/normal_602c61c1060c1.pdf
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5feb2702802cc.pdf
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5fe85fd2ba1a9.pdf
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcbae9a70f59.pdf
    • https://cdn-cms.f-static.net/uploads/4472186/normal_601b53618c23c.pdf
    • https://cdn-cms.f-static.net/uploads/4382949/normal_601baf7236460.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a4612d3-242b-41cc-8c1b-95de313dc2fe/42126380916.pdf
    • http://poforezufovu.pbworks.com/f/58604825447.pdf
    • https://uploads.strikinglycdn.com/files/c735f3f6-0555-4583-9790-872bd2108f13/87413443853.pdf
    • https://uploads.strikinglycdn.com/files/9b62e32f-773c-4bf6-b55c-772ad592c182/16813665558.pdf
    • https://uploads.strikinglycdn.com/files/039f74f8-5b7f-44aa-994e-59e9495160e5/el_uno_es_un_palito_en_forma_de_baston.pdf
    • https://uploads.strikinglycdn.com/files/fdfebac9-f2eb-4a0a-820d-2523a9083742/88263410366.pdf
    • http://visetululiv.pbworks.com/f/conventional_non_occupant_co_borrower_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/9ec19191-8395-4c9c-a748-fc20b9419c60/durixagivi.pdf
    • https://uploads.strikinglycdn.com/files/7a65260d-3bf7-45c4-ada3-51ce26806bce/6093624803.pdf
    • https://uploads.strikinglycdn.com/files/56a703cf-76ad-4d2f-8a43-b80d11942c20/cooks_essential_pressure_cooker_brown_rice.pdf
    • https://uploads.strikinglycdn.com/files/6dd9fa33-c312-4fed-9edf-381ad391564b/the_valley_of_horses_audiobook.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef11.bin
5baba51f8af57cf50dce8c83425cc731ac20f2adca5946cc03626899f70acd8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 5600 bytes
font_01_sfnt_off0001020b.bin
08668bedadf8bd6d31d484cc9451d39262cafdc65929753cc7344355d939754c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 10812 bytes

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