PDF malware analysis — malicious · 9583497dd99abd70

MALICIOUS

PDF

91.8 KB Created: 2012-10-19 13:17:45 +04:00 Authoring application: Adobe Designer 7.0

MD5: 6c1add6cf3e54a03d31dababd2ed64c7 SHA-1: a6e09fbb283c1d976bd89ddae8cd7f333199ab1f SHA-256: 9583497dd99abd70db4b61d5e086b44a9576b353723497ca916a31326cff6aaa

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link T1566.001 Spearphishing Attachment T1204 User Execution

The PDF sample contains high-severity heuristics indicating the presence of executable scripts and embedded files. Specifically, the 'PDF_XFA_SCRIPT' and 'PDF_EVAL' firings suggest that JavaScript within the XFA form is being executed. This script likely attempts to download and execute a secondary payload, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic and the presence of suspicious embedded files. The overall attack pattern points towards a malicious PDF designed to exploit vulnerabilities and deliver further malware.

Heuristics 8

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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
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
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 9

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0050.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 50 at offset 0x13367	85 bytes
`embedded_file_obj0051.bin` `f20aceb8dbc16d07642c756ca1ccc141a87f1f44f1a99949a4c6a6a8678b4c98`	pdf-embedded-file	PDF EmbeddedFile object 51 at offset 0x13419	1526 bytes
`embedded_file_obj0052.bin` `51951d77db8b51f23ed133532450010ee8016d952a6404a1566a27612fad9a99`	pdf-embedded-file	PDF EmbeddedFile object 52 at offset 0x136E9	6034 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0053.bin` `aec62a373cc94aa9dc9611ff78d461347588875e1a0167a58b8e29603db85e11`	pdf-embedded-file	PDF EmbeddedFile object 53 at offset 0x142FE	175 bytes
`embedded_file_obj0054.bin` `851068169faaac8fcdfa72571a46fea924d1fb0c33b95225802028dfa0b1c7a7`	pdf-embedded-file	PDF EmbeddedFile object 54 at offset 0x143CE	4800 bytes
`embedded_file_obj0055.bin` `57045217c453d4674a08ad8778674bf199a7989a9505424a1815c016e6bb412f`	pdf-embedded-file	PDF EmbeddedFile object 55 at offset 0x1486A	212 bytes
`font_00_cff_off0000138d.bin` `23831e143e2e1a484b95ee765b15d94562c951468b895c080e655667dc04ddf0`	pdf-font-stream	PDF embedded font (cff) at offset 0x138D	31178 bytes
`font_01_cff_off00007aef.bin` `96161e3d15cf67591ef2a1c87940c8dc0af59a94fcfab5d6bfcf4cb992a24af8`	pdf-font-stream	PDF embedded font (cff) at offset 0x7AEF	64586 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.45, consistent with packed or encrypted content.
`font_02_cff_off000149cf.bin` `ee77a5890b4568bbe9e287cfeaf668a51425e0057381501432e59fb0e718680e`	pdf-font-stream	PDF embedded font (cff) at offset 0x149CF	4459 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.42, consistent with packed or encrypted content.

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