PDF malware analysis — malicious · 46c28383ff1cf8e0

MALICIOUS

PDF

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

MD5: 7e321834bbc865663e5ac0064f5cb1ff SHA-1: ed63633053a3e6850ec1f29bc05a522fe64bdfa1 SHA-256: 46c28383ff1cf8e050cd1bb76b78afa2486ab62e4629a57a9b2f498975263f36

398 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link 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 `eval()` and `unescape()` calls within the JavaScript streams strongly suggest the execution of malicious code. ClamAV detections further confirm its malicious nature, identifying it as Pdf.Exploit.Agent-23272 and flagging an extracted JavaScript artifact as Js.Exploit.Shellcode-18. The primary attack pattern involves leveraging these vulnerabilities to achieve arbitrary code execution, likely for downloading and running a secondary payload.

Heuristics 10

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.Exploit.Agent-23272 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-23272
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `3d585bed9b19c5650bf2f001f1153a26aaf2315914b5bdbd87c6f80677c90616`	pdf-javascript-stream	PDF /JS object 32 at offset 0x3CE	165 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `36817d26bb88de0b73faba3dd62516dc4e3f51f03c1f65b52a957aa06f17157d`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4A9	113 bytes
`javascript_obj0036_002.js` `ddc7758a2f70940db3ea53d2bb03d277ca96f38eb5095fcdb6484978b52b6757`	pdf-javascript-stream	PDF /JS object 36 at offset 0xE9	119 bytes
`javascript_obj0038_003.js` `90d08d117b94235ecab4465c7af4d7d69492453abde5a2e461b13200102d23ee`	pdf-javascript-stream	PDF /JS object 38 at offset 0x1415	145 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `1b26f81acf660b3237e52ed8c1e530419d47a2aa2a1b106386dbdd3dbefb5e58`	pdf-javascript-stream	PDF /JS object 78 at offset 0x73	34 bytes
`legacy_pdfkit_stage_000.js` `5143a835b0b287667f7dfc4d64dad66a6e67a31d6f517acd3c4ed1987259f87f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x586	6429 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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