PDF malware analysis — malicious · e59fdb757826f73d

MALICIOUS

PDF

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

MD5: 2bd950e1606cdb6d8be016d103b9af91 SHA-1: fa467d54e39eb0c5fbac8e0f8ba39020c9bc77b4 SHA-256: e59fdb757826f73d01eb9f4fadbc6a08db4779d8100298028746d44ab9385255

340 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded and obfuscated JavaScript. The ClamAV detection of 'Pdf.Dropper.Agent-7317001-0' further confirms its malicious nature. The embedded JavaScript streams, particularly the deobfuscated ones, likely contain code to download and execute a second-stage payload, a common dropper behavior.

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-7317001-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7317001-0
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` `d6e7b52f7fc6a9bf72d395ccc338ab7cf582d74eedda3617a98f404dfed14584`	pdf-javascript-stream	PDF /JS object 32 at offset 0x411	127 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `6aa4345bf6fa629a62146577a7e3a74e2ca67eb864fe66e32b9cb87abd329d31`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4C9	118 bytes
`javascript_obj0036_002.js` `6c24d4ec23d8aa49b865e0e8c136b5f144524b0d7a39d05efb9cfd0ad7d209cf`	pdf-javascript-stream	PDF /JS object 36 at offset 0xFB	123 bytes
`javascript_obj0038_003.js` `f61a697e56989e9fa187809de9f9f7ea0d310f86a975c982eff336cee5d4fbc7`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC27	150 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `c66f853d06c08eba9b336a438dc7177f46132abeae694a208d088d5bfe7e2895`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	33 bytes
`legacy_pdfkit_stage_000.js` `31b4658e816bf6512e9edd1d1d4d2536030735e79fecaafbadaa6152ab43590d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5B1	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` `4b6528e09e8f7e0a3304e010f3388d2407cec627848104849ac558d2e23f4fbc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD47	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` `0b5bf909e8621ae336deca18937dd788beffefe38b64605fb4a63ce4d2f2f040`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13B3	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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