Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7c2d0a5322e368…

MALICIOUS

PDF

13.4 KB First seen: 2026-05-09
MD5: f0190176e89fade997a734654c4fa637 SHA-1: 1b1bb58afb1dedb584a0171a3027092db139dd80 SHA-256: 7f7c2d0a5322e368052df999e47f15231f154658d9dd881fa4024dffaf508b0d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains malformed active content and triggers heuristics indicating an exploit. Specifically, the shellcode embedded within the PDF contains a URL that is likely used to download a second-stage payload. The ML classifier and ClamAV detection strongly support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-36962 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36962
  • PDF exploit shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL
    Decoded PDF exploit shellcode contains a hardcoded http(s) URL — stored as little-endian %uXXXX Unicode escapes, or hex-encoded in a document metadata field (/CreationDate, /Title) and referenced from the decoded script. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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 http://xvidstubes.me/pointless/zero_which_strike.php?nqh=32:1k:1f:1f:31&dhxi=1m:1n:1f:31:2w:1i:1g:1o:31:1i&izqcedf=1i&mzk=iodvqfei&xndyump=lrbj Referenced by PDF JavaScript
    • http://www.xfa.org/schema/xfa-locale-set/2.1/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.2/Referenced by PDF JavaScript
    • http://ns.adobe.com/xdp/In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin pdf-embedded-file PDF EmbeddedFile object 41 at offset 0x2AC1 85 bytes
SHA-256: c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb
embedded_file_obj0042.bin pdf-embedded-file PDF EmbeddedFile object 42 at offset 0x2B73 1029 bytes
SHA-256: dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91
embedded_file_obj0043.bin pdf-embedded-file PDF EmbeddedFile object 43 at offset 0x2D8C 2028 bytes
SHA-256: e4357621b8ed8bbfa5f444ed3283aa0fc49504d729f067aebca709347820f72e
embedded_file_obj0044.bin pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x322C 144 bytes
SHA-256: 3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169
embedded_file_obj0045.bin pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x32D8 77 bytes
SHA-256: 10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275

Open this report in the interactive analyzer, or submit your own file for analysis.