Malicious PDF — malware analysis report

Static analysis result for SHA-256 693cdd6f6c96808a…

MALICIOUS

PDF

101.8 KB Created: 2021-01-01 07:21:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0604020d616334c3012052d59d0ceacf SHA-1: afbbf7a3cc52d0ed29ab2de06b1e303326a75a4f SHA-256: 693cdd6f6c96808ab62cecd48bb92569409d3f5ffb3615f8df890e33fa02228b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. A critical heuristic indicates a lure to execute commands via the clipboard, suggesting the document aims to trick the user into running arbitrary code. The embedded URL points to a suspicious domain, likely serving as a distribution point for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://traffnew.ru/aws?utm_term=android+linux+terminal+ubuntu PDF link annotation
    • https://nuxirudeduw.weebly.com/uploads/1/3/4/4/134442083/robede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fc899ad7de2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fce6fb799e8c.pdfIn PDF document text
    • https://jukaninigureze.weebly.com/uploads/1/3/0/7/130738482/bulav.pdfIn PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/9227331.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/pefajapibejobi.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/zepifudoxapo/lapivukumigovolafanine.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/wowomivep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d5ecb9-0ade-43e5-bd93-fd4238bc3b23/biochemistry_books_mbbs.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/broken_screen_live_wallpaper.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000139c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C3 4988 bytes
SHA-256: 8e578024de21ce747bca0c897af66d7b1fe99f16ce15ceb608a33145aa197203
font_01_sfnt_off00014a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9F 12304 bytes
SHA-256: 6bd321c0374850de7fe3f3206a9e3e18ba52388581aa7e826d5cf15a6f8a2615
font_02_sfnt_off000174be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174BE 16388 bytes
SHA-256: 0c82561ead172ac0e51412abe629b5944d5f81f469066018c017fef234fe4ba7

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