PDF malware analysis — malicious · c463fde2f8bdf9db

MALICIOUS

PDF

7.4 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 094594499918aba95cf8e688380d3ad8 SHA-1: 0933c9020001624d192a0adcb2615a847e9aeb65 SHA-256: c463fde2f8bdf9db190b55e0262b5ac5d4b914cebc8af154b03c826f7b64209f

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged through embedded and obfuscated JavaScript, which is then decoded and executed using `eval()` and `unescape()` functions. The primary function of the script appears to be downloading and executing a second-stage payload, as indicated by the ClamAV detection of 'Pdf.Dropper.Agent-7300582-0'.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Dropper.Agent-7300582-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7300582-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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.

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `38c29ce73ae306c1b702206a6ddae603ee66719bbf47d9d3bd94b2338ffb3c94`	pdf-javascript-stream	PDF /JS object 32 at offset 0x427	134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `df72fd8d797ac5a70088ede33cd0955532f64b8c281d4a1abc991f9eb4e5119d`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4E7	139 bytes
`javascript_obj0036_002.js` `1a35cc0a56f5885cc102c473ca08f277d01b16178dc3ab3831ccbaf7eb3fc7cc`	pdf-javascript-stream	PDF /JS object 36 at offset 0x109	158 bytes
`javascript_obj0038_003.js` `bcece5b855f796529eeddaf2d472e31f230923fd13c7327d5a93f30b1ae6404a`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC4F	178 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `dc7916b8cbe36e2a0ee8d62140b888f114b41274b68c3ce09add59b4a08f5611`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	47 bytes
`legacy_pdfkit_stage_000.js` `0d62645dbb58fa4281e2789ae0a17ea7093ab38388b55057519fa99226829ca0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5DE	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `866dc46ea756ff9401581fba64867aeb2e2ba9cdb838d1209dd7b4550715de78`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD8A	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `07996f8f5be2910c5e4b41c1243c23c72850c6cc0dc625d5d234c09a1fb7c9fb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13F3	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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