Malicious PDF — malware analysis report

Static analysis result for SHA-256 c607b51b4ff11a0b…

MALICIOUS

PDF

705.9 KB Created: 2006-06-30 13:26:52 -04:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 7.0.5 (Windows))
MD5: 90ea0a461bcc8b48beb2bcfd6525cb76 SHA-1: dcce614d744a3002a2017ed8fb41f15b922855af SHA-256: c607b51b4ff11a0bcc47647f754d39398b67a033616f8e17d2089459a49badd2
116 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, indicated by multiple PDF_JAVASCRIPT and PDF_JS heuristics. A high-confidence PDF_EVAL heuristic firing suggests the JavaScript is being executed, likely to exploit a vulnerability. The PDF_U3D_CVE_RELATED heuristic points to a potential exploit targeting 3D content. The extracted JavaScript artifacts, particularly 'javascript_obj0022_014.js' and 'stream_023_off000aae1e.js', are large and likely contain the malicious payload responsible for downloading further stages.

Heuristics 9

  • U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED
    PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • 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.
  • 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. (matched inside decoded stream)
  • 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
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0080_010.js
cb0b3d4c5f194e021b9a0221da3eb5e452e0eca53b84aa0f617c46eec75a9684		 pdf-javascript-stream PDF /JS object 80 at offset 0x12D08 33 bytes
javascript_obj0088_011.js
578aed31eeb16c7d5addb14deabb33c6d1ff616db3cf6757e3c42ed2a6f5cd20		 pdf-javascript-stream PDF /JS object 88 at offset 0x14E83 32 bytes
javascript_obj0096_012.js
ef3ea8a689375d1da4f1dc9d6cd8cab6faef31e75fc06dc5a4a8f1b59794f706		 pdf-javascript-stream PDF /JS object 96 at offset 0x17D62 33 bytes
javascript_obj0022_014.js
4249540f17429d6230e2e89c4c602203a7c7d68423bc1428d30e8c831da179dd		 pdf-javascript-stream PDF /JS object 22 at offset 0x1DFC 38816 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 15 eval/decoder/string-building token(s).
stream_022_off0002012d.bin
1fa05dd85369e1df013f43422856dfd93800915f4df8f02ac06668ba23369423		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2012D 591916 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.
stream_023_off000aae1e.js
06f306d8fb93f9949bd8c0c2c6dbff237df4583f14edbc276f25f5834f4d62ce		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAAE1E 89208 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
icc_00_off0000458d.icc
3f6d674174f3804eb0dabdac90ae17486e898c5063a66f861c116ea033da8301		 pdf-icc-profile PDF ICC profile at offset 0x458D 3144 bytes

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