Malicious PDF — malware analysis report

Static analysis result for SHA-256 b51bbe6d27e78a96…

MALICIOUS

PDF

76.4 KB Created: 2021-02-26 05:26:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c99b8d816bf9abc19cb9224af3e9075c SHA-1: 1eb85f9e6efdd81ffdf558039d3365f99344e528 SHA-256: b51bbe6d27e78a96b3bab16de545aebe2c7045a38ea650fe4f9e083a7e54a79f
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to business plans, aligning with common social engineering tactics.

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/award?keyword=home+based+bakery+business+plan+sample+philippines PDF link annotation
    • http://paxezot.getenjoyment.net/13027105356.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/what_anime_is_one_punch_man_from.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/algebra_1_writing_linear_equations_review_answers.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/sewodotudunurefidale.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/the_power_of_doing_less_download_free.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/restful_web_services_authentication_example_java.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/paxivogedewilu/pokera.pdfIn PDF document text
    • http://jokiperone.epizy.com/josatidorisik.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/bususu.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/apple_ipod_shuffle_4th_generation_waterproof.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/25310179049.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/sebabolegibepadonabivotob.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/53084960626.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/52215365143.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/9575004894.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/5343003941.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/66367999200.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/tefoj.pdfIn PDF document text
    • http://gorefoverotiw.epizy.com/zegedupol.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_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 5464 bytes
SHA-256: eac2e678e4a521b3166894328f41a91c750914703adec9b23853a9374e351331
font_01_sfnt_off000101cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CF 9976 bytes
SHA-256: ce3d11e8925d24abbd97307bc5f1cdd3f0038d93d89053ef49ecf3d06694a438

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