PDF malware analysis — malicious · da22db75d4c60eff

MALICIOUS

PDF

47.5 KB

MD5: 637308ab696aaa8d4de92e5f1f14000a SHA-1: ca6919a2151f5da2879c3a7b469e56e99dcd6b41 SHA-256: da22db75d4c60eff382510bbc3a8d1da20f6063f9014feec0ec421395af82b66

194 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating malicious intent. A critical heuristic firing for CVE-2010-2883 (Adobe Reader CoolType SING font exploit) strongly suggests this vulnerability is being leveraged. The embedded JavaScript, likely obfuscated, is designed to download and execute a secondary payload, as evidenced by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. The presence of multiple JavaScript streams and a PDF_JAVASCRIPT action further supports this attack vector.

Heuristics 9

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.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `7f9de3e72b9dd7c3445131443c6aee54b79866aa1adaa8040509a864354d1953`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	4515 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_002_off0000b4b5.js` `d1dfd457a2fdd3cec4091f689f39b85b35666aa5599ef3a8d5f9a80d1e2ce105`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB4B5	1042 bytes
`font_00_sfnt_off000016ff.bin` `a0ff65dacea5001326fa0ae5032b805f5f8b293f0c7ee5d436656c515636e683`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16FF	65932 bytes
`font_01_type1_off0000b956.bin` `c6bf78478c9c4dd5b3b86554d34c78f847f70af4118f9ff083c1fccf0e8e932b`	pdf-font-stream	PDF embedded font (type1) at offset 0xB956	97 bytes
`font_02_type1_off0000bbde.bin` `b749644b3e758e7335900ab2e7499eaa64b3a946849f1f8a0948287bdd96763d`	pdf-font-stream	PDF embedded font (type1) at offset 0xBBDE	144 bytes

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