Malicious PDF — malware analysis report

Static analysis result for SHA-256 270a695d1bac38f8…

MALICIOUS

PDF

19.3 KB Authoring application: Wfotuhkr Kwcknfwjm
MD5: c068ec8d4ab9c830309f7ffa4fe3a730 SHA-1: e50fa26efc72996fb686c5d16117aaf91fcc6e43 SHA-256: 270a695d1bac38f83a2742a45c046ce3700b2fcb10d99f8aaf0ae5fc35b5db41
116 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1566 Phishing T1566.002 Phishing: Spearphishing Attachment

The PDF contains XFA forms with executable scripts, a common technique for delivering malicious payloads. The ML classifier strongly indicates maliciousness. The embedded URL points to a suspicious executable file, suggesting the document's purpose is to trick the user into downloading and running this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://sgeji.cidiverte.info/NcgEMO0A_by30MKzC_0U7fi0/IcaZ0ZX_qv0pj6g-0aly614Jfc0R-tyH17Ug_L0_Vbb_Z09z-VB0xpw-m0/8sf-j0kg6D0/nIIs05t_eD0hh_Kg0/wb6/C18lDq1-3hM_a0qVT20_25wz0ATw-i0yI7I0_SgSw/0Q_k0f0/C3H90V-x7Q0f_Che0JgyW1-65bK0oI_Tu00_sil0_Q7ND0x/A8H0/Dh3l0T-rrg0hmgJ0i/kLR0j0-Ps0UAtg0/aupN0Rq/Ak-0vPIB_15kQt/0MKk_P0k2ov_0mfj30-NPrq0ezgt/0urw-s0kW4_Z0Hxdr0_Qrkc0H-6XN0O-leB0P_xL0-/GroZO2dCFU.exe?5Bho23hE4TNEHoSCg=ETzX9nB1r5ubUnC3Dt&quot
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
c12a695d3ffb3d2927f66f65fe84ab64d3eb77dee9b5bb32b606d0876ed5dd26		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x193B 12700 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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