Malicious PDF — malware analysis report

Static analysis result for SHA-256 501615fa67bf1ab4…

MALICIOUS

PDF

111.5 KB Created: 2021-02-25 21:56:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a59e8bc06337219e3026c89e6fcf9e2b SHA-1: 3d4a7e249c30f1acd43de2d56b16316580f47a38 SHA-256: 501615fa67bf1ab486d13b13da26a4cf803246dfb9b10f526f929977c0496f3f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, directing users to a website related to 'Scarborough town hall voting'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=scarborough+town+hall+voting
    • https://cdn-cms.f-static.net/uploads/4375088/normal_6025532a4c539.pdf
    • https://cdn-cms.f-static.net/uploads/4416656/normal_5fe7a1ba4b924.pdf
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6022fba4d1768.pdf
    • http://lojapidabud.mypressonline.com/tu_puedes_sanar_tu_vida_de_louise_l._hay.pdf
    • https://cdn-cms.f-static.net/uploads/4447252/normal_6021ebe9514f9.pdf
    • http://kiwenalod.medianewsonline.com/super_mario_bros_2_walkthrough_3ds.pdf
    • http://wijasagasipode.getenjoyment.net/critical_history_of_western_philosophy_y_masih.pdf
    • https://cdn-cms.f-static.net/uploads/4463528/normal_602d097f9e29e.pdf
    • https://static.s123-cdn-static.com/uploads/4483354/normal_5ffaec4e854ef.pdf
    • http://nejevefivi.mypressonline.com/what_is_biological_treatment.pdf
    • https://static.s123-cdn-static.com/uploads/4384640/normal_6001011b8336e.pdf
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fd0841a51627.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/niwotipugonuvoz/final_countdown_sheet_music_piano.pdf
    • https://s3.amazonaws.com/xeruxaxer/sojeg.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_off00017923.bin
1b041a92f67ec9f1fe226b48c28420000b49c86a912a0fd09ba8eb543876d6d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17923 5276 bytes
font_01_sfnt_off00018b2c.bin
e9ff0d114c37d480a7bfd88793425003f7e227543b479abe40c32fd49e197011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B2C 11108 bytes

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