Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2debdcc01e9fad…

MALICIOUS

PDF

31.5 KB Created: 2013-06-04 16:05:49 +04:00 Authoring application: Adobe Designer 7.0
MD5: 4cae22a4c592e23fe9a4533a9c726250 SHA-1: 76b2ae13c6d2cdf96ca5aad56bfeecb6c7fe6a32 SHA-256: df2debdcc01e9fad4a712c75c73cb987461d59b71e533bdb86905b8fc39e049e
192 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF document utilizes XFA forms and embedded JavaScript, a known vector for exploiting vulnerabilities in Adobe products. The JavaScript attempts to redirect the user to 'http://cgi.adobe.com/special/acrobat/update', likely to download and execute a malicious payload. The ML classifier strongly indicates maliciousness, and the presence of exploit cluster heuristics further supports this. The exact nature of the payload is not discernible from the provided scripts, hence the 'unknown family' designation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 9

  • 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.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • 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
  • 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://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/
    • http://cgi.adobe.com/special/acrobat/update
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.1/
    • http://www.xfa.org/schema/xfa-template/2.2/
    • http://www.xfa.org/schema/xfa-template/2.0/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://www.xfa.org/schema/xfa-locale-set/2.1/
    • http://ns.adobe.com/xtd/

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0027.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 27 at offset 0x22CE 85 bytes
embedded_file_obj0028.bin
7819f06630520bfd73f8079eece39a31ed650dc5a0392d84cc1a95b60eb179d9		 pdf-embedded-file PDF EmbeddedFile object 28 at offset 0x2380 1520 bytes
embedded_file_obj0029.bin
7bbb44f108b5be2d4940f213c640902e2307c9ef005685a84ee1750676cc4f95		 pdf-embedded-file PDF EmbeddedFile object 29 at offset 0x264E 26357 bytes
embedded_file_obj0030.bin
02056cedf5f2c7861a322b445e5ac7e2879496934a3266e11105e083b0913ac3		 pdf-embedded-file PDF EmbeddedFile object 30 at offset 0x6714 503 bytes
embedded_file_obj0031.bin
e705f8fbc86048d63338b8eee28deb3965d674af1b338994f05e4470e86f53c9		 pdf-embedded-file PDF EmbeddedFile object 31 at offset 0x6819 4643 bytes
embedded_file_obj0032.bin
57045217c453d4674a08ad8778674bf199a7989a9505424a1815c016e6bb412f		 pdf-embedded-file PDF EmbeddedFile object 32 at offset 0x6C72 212 bytes
javascript_obj0019_000.js
4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb		 pdf-javascript-stream PDF /JS object 19 at offset 0x1B57 870 bytes
javascript_obj0021_001.js
4e139c8b22ec16bd5aa51575c80dec2bbf89b76977a06b68473031a0eb206366		 pdf-javascript-stream PDF /JS object 21 at offset 0x1CDB 2794 bytes
javascript_obj0023_002.js
c876171bd867b66b7671fb337ff9e57d18cd15b43d344cf5a7243821300a408a		 pdf-javascript-stream PDF /JS object 23 at offset 0x1FCA 1528 bytes

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