PDF malware analysis — malicious · 1797c7c4d16fe8a4

MALICIOUS

PDF

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

MD5: fd8de575be55cfe1e87f3141c2623c41 SHA-1: cc7b19e48d3de72675d547f6de95150db0c4f9e2 SHA-256: 1797c7c4d16fe8a4e8d2102c131264de21f9b57d543baf33e63a077ea4dab1be

270 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of known CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) via embedded JavaScript. The JavaScript is designed to download a second-stage payload from the URLs http://thintin.com/1/sv777/load.php?spl=pdf_new and http://thintin.com/1/sv777/load.php?spl=pdf_pack. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
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://thintin.com/1/sv777/load.php?spl=pdf_new
- http://thintin.com/1/sv777/load.php?spl=pdf_pack

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `c2dbdf1f95aa93ef651e8069f62ac5374148b085c30aec2b7e9d5ada8e0caddc`	pdf-javascript-stream	PDF /JS object 32 at offset 0x301	241 bytes
`javascript_obj0034_001.js` `ec2c088a236834892e1b71e2ceceed35c96b747b373be2f1505bca7216718542`	pdf-javascript-stream	PDF /JS object 34 at offset 0x3EC	367 bytes
`javascript_obj0036_002.js` `9c8b5390e1bf738a57067ba4e4e721085ca9227c41d5b10bb36e83b542cc5b4d`	pdf-javascript-stream	PDF /JS object 36 at offset 0xAC	202 bytes
`legacy_pdfkit_stage_000.js` `8eeeea4e231fe3ba8b79434c13d2000ed00c1f5a9b039090f0a07e8f3d940d1b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x522	1651 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` `2744ae0eea65d75a9302c7d99ae16814ae90ce5f83379899eaae40106cf446a0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAB2	1803 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` `721f67b3bdb69c48ca68104f925923a6e9d73a6161991616a4218a741337c341`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x101D	2955 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).

Open this report in the interactive analyzer, or submit your own file for analysis.