PDF malware analysis — malicious · 1b8e7bc6a53ffce7

MALICIOUS

PDF

112.8 KB

MD5: 52b194364f8fec9ae785bddb3615a230 SHA-1: bef982c1739ef18081b595a01d39a42351b20c3f SHA-256: 1b8e7bc6a53ffce76e84f11bc2cd4a96fb56680a36017ba49f92aa49582a1c27

106 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified the CVE-2010-2883 exploit targeting Adobe Reader's CoolType SING font. The presence of a large extracted JavaScript file (javascript_obj0029_000.js) suggests the script is responsible for the malicious activity, likely downloading and executing a second-stage payload. The XFA form and ASCIIHexDecode filter further support the exploitation attempt.

Heuristics 6

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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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
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_obj0029_000.js` `41709f96cd50e9dc0f3f3363cdedf8861c804165e3d581cbe6b84ba53bbc9a71`	pdf-javascript-stream	PDF /JS object 29 at offset 0x1A7FC	15301 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`javascript_obj0038_001.js` `2c0b66ec50073178ddc3de2aaf0627ef83819a8f71c118ff3b075b4bd82749fe`	pdf-javascript-stream	PDF /JS object 38 at offset 0x1B82	1242 bytes
`javascript_obj0039_002.js` `d8bbcc5984e6bec8996e18881fad0486ff520c9b9f03ee0fb9694ddfc412340d`	pdf-javascript-stream	PDF /JS object 39 at offset 0x214F	1572 bytes
`stream_004_off00000b11.bin` `69e17a0038b9273e6d005ef52313a832cb41b9cf9713d6134d0cf9f2e59298a7`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB11	434 bytes
`font_00_sfnt_off00001152.bin` `fc85f44193ccd402987935418c4f5fdf6802c96450b789e7fce04f9791933021`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1152	7965 bytes
`font_01_sfnt_off00001903.bin` `1e827515a464087cdace63e3578c118b45a657ed40cdbb9de7eead35c9b593ba`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1903	7965 bytes

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