Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36ad45bb847a489…

MALICIOUS

PDF

76.6 KB Created: 2021-01-20 19:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d15a45d12d0f05c18db26e36f19a0490 SHA-1: 745f045960913246887fcb3cf20269582c18a64a SHA-256: f36ad45bb847a4898845133bc9bc975c97bbe0e5309f633e9724a2919d7245c8
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, and contains heuristics indicating it is a phishing lure. The embedded URL, https://leonvi.ru/123?utm_term=contoh+surat+setoran+pajak, is likely the primary objective for the user to interact with. While no scripts were explicitly extracted, the PDF structure and malicious detection suggest it may contain embedded JavaScript or exploit code to facilitate the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://leonvi.ru/123?utm_term=contoh+surat+setoran+pajak PDF link annotation
    • https://cdn.sqhk.co/wumidimux/haQBivN/hyperspace_star_wars_song.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8a6a05738cc.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/dZij5jf/tiketodajibaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451369/normal_5fbb735f63b89.pdfIn PDF document text
    • https://site-1171454.mozfiles.com/files/1171454/artillery_3d_printer_genius.pdfIn PDF document text
    • https://cdn.sqhk.co/ziratede/PfQTheb/tosarefibosawix.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/dgjTjb3/36991570416.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/aibzgFG/musaxeroxukojitafediwumug.pdfIn PDF document text
    • https://site-1178723.mozfiles.com/files/1178723/car_accident_reporting_centre_mississauga_on.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412891/normal_5fab7b806f6d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fbe2d87495fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zafirawit/ignou_acknowledgement_slip.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/cisco_nexus_9000_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/canadian_passport_application_form_instructions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA1 4872 bytes
SHA-256: 71afeef8cd76d4bd21ff0ea46ae637e60d54055dbb9f11f776f614f4c52a537a
font_01_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 12916 bytes
SHA-256: a7cf6c34e7ce2da431547b55811b82598bdd853b53c0520a9a619192bd3fb133
font_02_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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