Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e0edcf5385c723…

MALICIOUS

PDF

88.3 KB Created: 2021-03-26 07:30:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b5a68ef3c08344b5fab01120916c727 SHA-1: 1aa825bbee20dc6516e5eda97ff56ccd82be354d SHA-256: 55e0edcf5385c723ffcb1a8a0868636c6cd9b2efe3af224e8aedcdf506a5092e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://nipisod.ru/wix?keyword=protest+song+analysis+worksheet
    • https://cdn-cms.f-static.net/uploads/4459479/normal_600dc3aa704b8.pdf
    • https://cdn-cms.f-static.net/uploads/4402478/normal_600cf0ee23949.pdf
    • https://cdn-cms.f-static.net/uploads/4378149/normal_605d6c218cd5f.pdf
    • https://cdn-cms.f-static.net/uploads/4453144/normal_5fd183331ff09.pdf
    • https://cdn-cms.f-static.net/uploads/4421613/normal_6034e2b7959af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/459576d4-0bfb-42c6-864b-7eff6c6fca4b/89417969601.pdf
    • http://serepuzokoz.epizy.com/bailey_and_love_free.pdf
    • https://s3.amazonaws.com/befafuni/guzunijometugetanovidalu.pdf
    • https://uploads.strikinglycdn.com/files/9df5546c-cabb-4d89-9f66-a3c884e74471/samsung_55_inch_4k_curved_tv_picture_settings.pdf
    • http://potubavaziripek.epizy.com/sheet_metal_forming_techniques.pdf
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_faf10621ed424d21b449249b248aab89.pdf?index=true
    • http://lonozixugixapap.epizy.com/demonology_warlock_5._4._8_pvp_guide.pdf
    • http://risuduk.epizy.com/puviboferedo.pdf
    • https://e41bb7a9-a35b-4578-ac27-1eab720d379a.filesusr.com/ugd/8912ce_3026d3f9f44e490ead1bbbc30fc23df2.pdf?index=true
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_cd77eff84eb7415aa361e220507e6062.pdf?index=true
    • https://s3.amazonaws.com/gozifep/andromeda_cracked_apk.pdf
    • https://s3.amazonaws.com/paxivogedewilu/electrical_artisan_interview_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/34423917-f091-4057-b1dd-0c1d8e9d61f7/26929529488.pdf
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_cc40cb098f12421b81a1e4852da87fba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/d5046b6f-3507-4ebf-9ef5-db4e7e0870eb/the_witcher_the_last_wish_hardcover.pdf
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_80b5888eb87a451b8018429d80470920.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010644.bin
baccb70fba7e4f637c3d2f1ee9ae83f2da33d48eff5771451bcddaf46133c075		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 5204 bytes
font_01_sfnt_off00011808.bin
7a6de036cb0fbddb8cdf161588b560945e349b79189da8cb48ef4c67fc67901d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 11300 bytes
font_02_sfnt_off00013ee3.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE3 16092 bytes

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