Malicious PDF — malware analysis report

Static analysis result for SHA-256 f247b6e2c78588a9…

MALICIOUS

PDF

67.2 KB Created: 2021-02-18 14:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bfa7296c42be305d2e3fea786fe228a4 SHA-1: 2cfc61b1d6483bd3e7a795faf46845e7fee3a68a SHA-256: f247b6e2c78588a99532eb0c2ef4787839f52a7a88a1d6335ef65aac6e67088d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a URL associated with a lure for downloading free music, likely a phishing or malware distribution tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=fearless+taylor+swift+mp3+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fda31562ab93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_600e744000355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_602456ee540b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_6009cdb9d0a51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481821/normal_601340564c864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b63bdbdf7.pdfIn PDF document text
    • http://gelumagiz.iblogger.org/bowoxapokogigisovid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408346/normal_6026921389169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_60125155ba205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_6019980526b1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420910/normal_602a2e76c02d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368467/normal_5ff27e1eeeafe.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/rizijubovapuk/driver_windows_10_64_bit_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/cisco_catalyst_9300_series_switch_datasheet.pdfIn PDF document text
    • http://fekalalorupip.rf.gd/adjective_form_of_law-_abiding.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/5707261876.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/believer_full_song_in_masstamilan.pdfIn PDF document text
    • http://zepedijuva.epizy.com/venture_capital_funding_report_q2_2018.pdfIn PDF document text
    • http://vigukesege.epizy.com/nuvupekujalu.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_off0000c848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC848 5500 bytes
SHA-256: 5dc5a6f8af28826f9df3a056347b984bf9507408554470d6753c75a55c5e981f
font_01_sfnt_off0000db04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB04 11080 bytes
SHA-256: f701f1592a9e502cdf798a0c0f34f62cceed1c0b7e624c14bc26cdc2005fa763

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