Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b450671396f611…

MALICIOUS

PDF

75.6 KB Created: 2021-03-25 12:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 390f635eaa56f959953569d11fd243b5 SHA-1: 498e0b42a26e133dd21d3c85739f456d887f23d0 SHA-256: 98b450671396f611e99f63ee2fb103febbee3103df64f85548938adda2ca8020
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a URL that appears to be a lure, disguised as sheet music. The presence of PDF-specific heuristics suggests exploitation of a PDF vulnerability to execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/award?keyword=autumn+leaves+piano+solo+sheet+music+pdf PDF link annotation
    • http://giocodigital.website/zone_of_proximal_development_refers_tosqg8f.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/geo_flex_11._6_review2roi8.pdfIn PDF document text
    • http://useplafond.xyz/what_are_the_functions_of_golgi_apparatus_in_pointsrui6t.pdfIn PDF document text
    • http://bigtittybella.com/chp_accident_report_phone_numbers0w2l.pdfIn PDF document text
    • http://ezfix.asia/jupyter_notebook_download_for_windows_8_64_bitbqqlu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5fcb70d32a342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454984/normal_5fedcb34e4f9a.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/petuzutemixuvod/1849175807.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/building_construction_book_bc_punmia.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/90005609401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f827c17-76c9-47d6-8ba8-14a04b6494cd/51170689263.pdfIn PDF document text
    • http://katiziwaw.rf.gd/sonomuponezokepatoxevogi.pdfIn PDF document text
    • http://rokazit.epizy.com/porugifumafizozekidagax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854a24d5-a2e1-40b3-8f09-302319766d09/87225982737.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/opteka_85mm_f_1._8_manual_focus.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/galiguvuse.pdfIn PDF document text
    • http://kalidoro.epizy.com/kubinosa.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/tojozikikifidamatitama.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/73224750283.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/pitir.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/edipo_rey_libros_en_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a732056a-981d-4eb6-979c-8f6aeba68c92/bulugojelamejarisekutitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9aa05c5f-c3dc-4de9-a67d-8a828a225e4d/18776866107.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/index_card_template_mac.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_off0000e9cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CF 5348 bytes
SHA-256: 63cc67b644f090554069be0ced51a168c364c148286ae2e490cd9f927e8418b3
font_01_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 10800 bytes
SHA-256: b259cfe2732003ec02a57d6c539f37530f6c7780b9f12fe86f07ceed208362f7

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