Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77d3d076a2b842d…

MALICIOUS

PDF

86.0 KB Created: 2021-02-25 23:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 790ba3d4929873e7963ade5432ed439e SHA-1: fa43d7427eb9770d116ee5a50a1c943d4e04a4ca SHA-256: b77d3d076a2b842da270c8176cbc7ee17c5732f0a5798eb4178d5e72fe0e6d99
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 as part of a phishing or malware distribution scheme. 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.

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://baarspo.ru/123?utm_term=a+christmas+carol+2019+episode+length PDF link annotation
    • https://cdn.sqhk.co/kexofodatop/jcmxNji/who_all_died_in_13_reasons_why_series.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/hd1qjhO/jejolofixoravuxele.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601960cf37d4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487007/normal_5fde3f73bb607.pdfIn PDF document text
    • http://newapegujopabi.22web.org/i_robot_book_summary_sparknotes.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/xjhAdib/within_the_ruins_deliverance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470832/normal_5fd7d5796c4ee.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/ihgDwcH/melody_gardot_sunset_in_the_blue_credits.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_601bb71974e9e.pdfIn PDF document text
    • http://jomokanus.22web.org/89850467991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_60237e983f71a.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/pasawe/pukekojubilovamufidakowi.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/dositefexarubo.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/blackmart_apk__2017.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/xcel_energy_bill_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/fragen_formulieren_franzsisch.pdfIn PDF document text
    • http://fepaxediv.rf.gd/27692492005.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/kukuwixekokasunukusuzixem.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/koxewoxutom.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA33 5960 bytes
SHA-256: ae526e1cdeb03485a13e4cc8f0ef73c966947e8a84b884e9e07dc49df7a1fc52
font_01_sfnt_off00010e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4D 10984 bytes
SHA-256: 56196c3ef50ad9ba126571fe6f4746facde0c206ec674a2a2597af4fcb7692cd
font_02_sfnt_off0001332a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332A 16616 bytes
SHA-256: 87bb59e6b957ce6ed7a8fb14ec3281d302c6d7d409fe032fc516675b31191539

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