PDF malware analysis — malicious · b981b806c736749f

MALICIOUS

PDF

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

MD5: 7a84e808dae3874f0bd4571a4069c9f5 SHA-1: e9756f1b0bcbcefdee2aaea0f110d6a4bd656e25 SHA-256: b981b806c736749facfa7c7a6797d5bfcdee4a41e89bd8fabe8b8d36bda8a07d

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are related to JavaScript execution within Adobe Reader. The presence of `eval()` and `unescape()` calls, along with embedded JavaScript streams, strongly suggests that the script is designed to download and execute a secondary payload. The ClamAV detection of 'Js.Exploit.Shellcode-18' further supports this assessment. No specific malware family could be confidently identified.

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 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` `9029b7075f2a506534f9d5459de2224a6b8e8e41101f2eb1ad0654c37b90e2a3`	pdf-javascript-stream	PDF /JS object 32 at offset 0x3A7	143 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `d44a3d3309214b50763ab0ad88fe805186cf3aa1cea152cc84cf183e19dfa404`	pdf-javascript-stream	PDF /JS object 34 at offset 0x44B	145 bytes
`javascript_obj0036_002.js` `da547f472a5c77dcf58970fb83ba8e09360007bb227cb7746d8bf3fab1e1e533`	pdf-javascript-stream	PDF /JS object 36 at offset 0xD9	121 bytes
`javascript_obj0038_003.js` `8c57f22785485141a97a403dd8cfb344c98e53aa7ba9c27689b49ccf45cca8b6`	pdf-javascript-stream	PDF /JS object 38 at offset 0x1247	157 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `bc8faa385ef009b1d1b34651903412c5e87a38b60c23dc36a13b7af399bd41f9`	pdf-javascript-stream	PDF /JS object 78 at offset 0x73	32 bytes
`legacy_pdfkit_stage_000.js` `5143a835b0b287667f7dfc4d64dad66a6e67a31d6f517acd3c4ed1987259f87f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x525	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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