PDF malware analysis — malicious · 1b9157dd82aeeb19

MALICIOUS

PDF

45.5 KB

MD5: 18ced154d151310e4301c743ba13d275 SHA-1: afd8acf5dbc9690a3d9a78944b2a864d902a5957 SHA-256: 1b9157dd82aeeb1917fa1eb22cfc068ab607a42f490b147236344836760038ee

154 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

This PDF document exploits the CVE-2010-2883 vulnerability in Adobe Reader. The exploit triggers embedded JavaScript, which is obfuscated but likely intended to download and execute a secondary payload. The presence of JavaScript actions and embedded script streams strongly indicates a malicious intent to compromise the user's system.

Heuristics 8

Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883

PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `aa2b0feed91deb01e858479b6ed36a3a38496954a11bd31ff1ec5d1662ff4376`	pdf-javascript-stream	PDF /JS object 6 at offset 0x348	2388 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_002_off0000ac8c.js` `d1dfd457a2fdd3cec4091f689f39b85b35666aa5599ef3a8d5f9a80d1e2ce105`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xAC8C	1042 bytes
`font_00_type1_off0000b130.bin` `c6bf78478c9c4dd5b3b86554d34c78f847f70af4118f9ff083c1fccf0e8e932b`	pdf-font-stream	PDF embedded font (type1) at offset 0xB130	97 bytes
`font_01_type1_off0000b3b9.bin` `b749644b3e758e7335900ab2e7499eaa64b3a946849f1f8a0948287bdd96763d`	pdf-font-stream	PDF embedded font (type1) at offset 0xB3B9	144 bytes

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