PDF malware analysis — malicious · cd9b81a68f348c09

MALICIOUS

PDF

45.7 KB

MD5: 0f9f6508fe890a691f816a906c10ef13 SHA-1: 8cd1c1434f5b96dc56c04d995cc026a8430d9986 SHA-256: cd9b81a68f348c0950f567f440b028b7e1fa9059db4d5676de2991d93d45cb7f

254 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. Critical heuristics identified the CVE-2010-2883 exploit for Adobe Reader and a general ClamAV detection for a PDF dropper. The embedded JavaScript, particularly the unescape() call and decompressed stream payload, likely facilitates the download and execution of a second-stage payload, consistent with a dropper's behavior.

Heuristics 10

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.
ClamAV: Pdf.Dropper.Agent-7305472-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7305472-0
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` `1bde3666186de25f1358c2b8f4760372902cfd084a8bd78d34b9d2e65abc94c1`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	2631 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_002_off0000ad74.js` `d1dfd457a2fdd3cec4091f689f39b85b35666aa5599ef3a8d5f9a80d1e2ce105`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xAD74	1042 bytes
`font_00_sfnt_off00000fb9.bin` `c6cce0200a47d86a6a860cfb39709294d717e3e267bdf3c2db5db64879eb6214`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB9	65932 bytes
`font_01_type1_off0000b218.bin` `c6bf78478c9c4dd5b3b86554d34c78f847f70af4118f9ff083c1fccf0e8e932b`	pdf-font-stream	PDF embedded font (type1) at offset 0xB218	97 bytes
`font_02_type1_off0000b4a1.bin` `b749644b3e758e7335900ab2e7499eaa64b3a946849f1f8a0948287bdd96763d`	pdf-font-stream	PDF embedded font (type1) at offset 0xB4A1	144 bytes

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