Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2eb3fd9f7b276e…

MALICIOUS

PDF

291.3 KB Created: 2007-01-09 11:04:58 +02:00 Authoring application: Adobe Designer 7.0
MD5: af9ce11d715160ebbaad13ad368604fd SHA-1: 89f4bad25302a7645243accb81861b2d451664ee SHA-256: 1d2eb3fd9f7b276e919071ae2abab3778b4cbff848198ebb0d6718b73047b351
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by an ML classifier. It contains multiple embedded JavaScript streams, with one stream (javascript_obj0053_002.js) being particularly large and complex, suggesting it is the primary payload. The presence of embedded scripts and the ML classification strongly indicate an attempt to deliver a malicious payload, likely through the execution of the JavaScript. The specific actions of the JavaScript are not fully discernible due to obfuscation, but its presence and the overall malicious verdict point to a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0057.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 57 at offset 0x3BB51 85 bytes
embedded_file_obj0058.bin
5130d4978a813017191a235d357d163f205b7ab2a3f29409fdc9e4222c766ada		 pdf-embedded-file PDF EmbeddedFile object 58 at offset 0x3BC03 1675 bytes
embedded_file_obj0059.bin
3c166db557aacf9feb761b00e094c88f8df7e48010579106883086b0dd14edc1		 pdf-embedded-file PDF EmbeddedFile object 59 at offset 0x3BEFA 348461 bytes
embedded_file_obj0060.bin
57045217c453d4674a08ad8778674bf199a7989a9505424a1815c016e6bb412f		 pdf-embedded-file PDF EmbeddedFile object 60 at offset 0x41540 212 bytes
embedded_file_obj0061.bin
5b76974f6519323d14f0e1f4025a73bd87e9dbb5c67084a5852b858ea757f5bc		 pdf-embedded-file PDF EmbeddedFile object 61 at offset 0x41637 262 bytes
javascript_obj0049_000.js
4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb		 pdf-javascript-stream PDF /JS object 49 at offset 0x3B3DA 870 bytes
javascript_obj0051_001.js
4e139c8b22ec16bd5aa51575c80dec2bbf89b76977a06b68473031a0eb206366		 pdf-javascript-stream PDF /JS object 51 at offset 0x3B55E 2794 bytes
javascript_obj0053_002.js
c876171bd867b66b7671fb337ff9e57d18cd15b43d344cf5a7243821300a408a		 pdf-javascript-stream PDF /JS object 53 at offset 0x3B84D 1528 bytes
stream_004_off000011cc.bin
3463cb6a96f307e7e3d7300dfb47d1a354c957c464dadd2539dcb8dc271d2635		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11CC 293120 bytes
font_00_cff_off0002ce09.bin
96161e3d15cf67591ef2a1c87940c8dc0af59a94fcfab5d6bfcf4cb992a24af8		 pdf-font-stream PDF embedded font (cff) at offset 0x2CE09 64586 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.45, consistent with packed or encrypted content.

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