Malicious PDF — malware analysis report

Static analysis result for SHA-256 490d1b6b5a1ebda0…

MALICIOUS

PDF

78.7 KB Created: 2020-11-11 13:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44389442f973bae961cf4fcba3c8d5cb SHA-1: 98c36917fe423fca8f5a84a482f67d7e22057f2e SHA-256: 490d1b6b5a1ebda0f9ea2d1b699ab392d03ae05b498a3dbc18ff36c970d0e38b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. Several embedded URLs were extracted, suggesting potential download or redirection points for further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://traffine.ru/123?keyword=permutation+city+review
    • https://denalozi.weebly.com/uploads/1/3/0/7/130776502/5819340.pdf
    • https://tivulose.weebly.com/uploads/1/3/4/3/134318041/c2b14acb6b1782.pdf
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/ecabb88f170c62b.pdf
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/murezumavul.pdf
    • https://tuluseso.weebly.com/uploads/1/3/4/7/134718642/0072f2ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/datarofapakil/bufikajirojovako.pdf
    • https://uploads.strikinglycdn.com/files/9f447681-a552-48e4-b4fd-8552ee1b7ec8/sitisazugi.pdf
    • https://s3.amazonaws.com/jeworurowam/men_on_strike_free.pdf
    • https://s3.amazonaws.com/desenaz/subway_surfer_apk_download_for_pc.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa87.bin
94b9abd901bb245ae1985ef4131b50734e94fc4a93743c82ddef87f92e51a3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA87 4988 bytes
font_01_sfnt_off00010b7d.bin
26a49bdd2cfd9dd9d4caa1a082fd3e060c3aad0d584a2a982c142ada268b61e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7D 10280 bytes

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