Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dcef69bd87833fc…

MALICIOUS

PDF

79.4 KB Created: 2021-03-17 04:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 8dbc57d9f4a295c691ea81994f4bc2f6 SHA-1: 510388ccc82ee1f88f7a0deb5e4092ba55808688 SHA-256: 3dcef69bd87833fc6618d499b580de731e3fd879cf90be54db07a4cee50017c8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely to deliver a phishing page or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to trick users into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/123?utm_term=free+printable+kindergarten+number+writing+worksheets PDF link annotation
    • https://cdn.sqhk.co/vedanoderifu/mjhaifN/free_match_3_games_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/6hdTWKo/3415016923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_6033684487134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_60186b8545893.pdfIn PDF document text
    • https://cdn.sqhk.co/jixavome/jcjcgeJ/50855528779.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/7664474.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/xusisulijipif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470232/normal_6003432c32c30.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/fantastic_mr_fox_full_movie_stream.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474471/normal_60362e439e59f.pdfIn PDF document text
    • https://bibawegosisuzu.weebly.com/uploads/1/3/5/9/135961680/tiriteferuzozipega.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fc6b11f8bae3.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/pulujolatepuv/free_english_comprehension_worksheets_for_year_3.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_1276855a049e420ebd40f24e006f606f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/turn_bed_sheet_into_toga.pdfIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_8ed0dbebe11345e5b9f55d6b0a8452bc.pdf?index=trueIn PDF document text
    • http://nujugeteteda.myartsonline.com/58830212754.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/mukebavujigedonosun.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_567a04680fb94025a602452cc66b8a3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/garmin_gpsmap_64x_vs_64st.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/avatar_movie_in_telugu_free_utorrent.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_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 5624 bytes
SHA-256: 62d8b8367c4bcac50f61ad228a0023d0a25764d7a43f50dd6b2e6acb2a1bc85d
font_01_sfnt_off00010857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 10928 bytes
SHA-256: 1f941d9c466a50c54407f04ef78f2dbdf715ad6a27bc731185ad75bdbeb51253

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