Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c298e17dfae471…

MALICIOUS

PDF

77.9 KB Created: 2021-03-06 01:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f770f40f720df2582a47fdfdfe019e43 SHA-1: b720ca959e17f4d2afa9a936507bab9c8796ba2c SHA-256: b9c298e17dfae4718046b77f499fe1e531e8a421fb4f603a5cbd0ad0e8451d28
136 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into downloading an encrypted payload. The embedded URL points to a PDF, likely a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kuzutuzo.ru/123?utm_term=pass+mathematics+grade+12+pdf PDF link annotation
    • https://cdn.sqhk.co/rozopebak/gchejcH/run_race_ball_3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460066/normal_5fc9e039bb4c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fdd2c923a24e.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/IBDghgi/hoplite_key_manager.pdfIn PDF document text
    • http://tetupamino.mywebcommunity.org/teeth_look_whiter_after_flossing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458621/normal_5ffe714fe1101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459935/normal_5fd3cc737c0fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_5fe8e2d66387a.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/35549173371.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/cMhb2gi/wozafolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483071/normal_5ffbf5cc88ed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_601e3cfa2718f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458631/normal_6004ba80c4dfb.pdfIn PDF document text
    • http://wusator.mygamesonline.org/what_is_glycolytic_system.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/eiaSLji/outfoxed_definition_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366346/normal_600189348e006.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457330/normal_5fc9cdbb0adbf.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
    • http://jokosen.atwebpages.com/52528866724.pdfIn PDF document text
    • http://sizemogigu.myartsonline.com/motorola_xpr_7550_earpiece.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/88771299921.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_off0000e1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EA 5296 bytes
SHA-256: eeca631034ca53f0e1cc524fb9dfb3320dac7a378b6c5f8a20ac42cf81cefec3
font_01_sfnt_off0000f3ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 11956 bytes
SHA-256: 38d767769d24e2830671d38c5da46ad800ec2534d76e8dbe5b0c0fd5441ca4fd
font_02_sfnt_off00011bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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