PDF / .IN malware analysis — malicious · 01f0af4037808791

MALICIOUS

PDF / .IN

3.6 KB

MD5: 4e6c265c195f19d87c423542fa3ddf9e SHA-1: 4b9f74e67da3a1bf4695833b672f11c134fb6199 SHA-256: 01f0af40378087911bb79de5a6c79c26628caa26036c9257d2f0720e762d966a

450 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability through `Collab.getIcon`. The script is designed to download and execute a second-stage payload from the URL http://qtg.in/index4.php?src=196&grp=11&trk=0511200519065302&trki=2a5eba0c0d23b57b185d947ddfabe37a&e=7&. This indicates a typical downloader or dropper pattern.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 12

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.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.CVE_2009_0927-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.CVE_2009_0927-1
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
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
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://qtg.in/index4.php?src=196&grp=11&trk=0511200519065302&trki=2a5eba0c0d23b57b185d947ddfabe37a&e=7&

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `3b3989d8b2145a9fa44eb44b21f00740d2dac3c2bd6f9167d0bd85d668a35f7b`	pdf-javascript-stream	PDF /JS object 8 at offset 0x217	533 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0008_001.js` `8cf71e87e32752b54c0698f440263cc22cd4e78cb4675130bd9cefaffee19833`	pdf-javascript-stream	PDF /JS object 8 at offset 0x23D	3085 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`generic_stage_recovery_000.js` `f6dc7bdbc6da34e1f3699ac2ed63a2f290e74eb5f39a649e957b24a7443eccda`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 8 at offset 0x23D	3083 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `3bf9511376feb137637f3736f2d9e165c21c64d165be9b1ffbed6c2517fc9fe0`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x217	3617 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`generic_stage_recovery_002.js` `703568a4de892f750fb99fcd328de09f5ca1b67de6955a2b5880c2d2dbc8a2bc`	deobfuscated-js	generic stage recovery percent-decode from decompressed stream at 0x0 at offset 0x0	3648 bytes
Detection ClamAV: Pdf.Exploit.CVE_2009_0927-1 Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`combined_document_js_000.js` `2d9ea2c47a73ae0665a1e1ca98897ca0eb41e473a1fbac1c45236e90d7e8f810`	deobfuscated-js	combined document JavaScript streams at offset 0x217	3619 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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