Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1af4f4b2d8b1fc…

MALICIOUS

PDF

45.4 KB
MD5: 28961f6892b1ff2335d241a215c8e954 SHA-1: 1d6ff0dff4f03c11daeabb4945e19bbb030c46b5 SHA-256: bf1af4f4b2d8b1fc4b2e2e8949d04c134e6a10183c017dba75171f92ca0dafd6
214 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript and exploits CVE-2010-2883, a known vulnerability in Adobe Reader. The embedded JavaScript, identified as 'javascript_obj0006_000.js', is likely responsible for downloading and executing a secondary payload. The ClamAV detection 'Pdf.Dropper.Agent-7217375-0' further supports its malicious nature as a dropper.

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.
  • ClamAV: Pdf.Dropper.Agent-7217375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7217375-0
  • 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.

FilenameKindSourceSize
javascript_obj0006_000.js
a0ed4d42469a4021e45e0f4ebb6ea232de5222371751213b3869820b46be9d4a		 pdf-javascript-stream PDF /JS object 6 at offset 0x348 2307 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
stream_002_off0000ac44.js
d1dfd457a2fdd3cec4091f689f39b85b35666aa5599ef3a8d5f9a80d1e2ce105		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAC44 1042 bytes
font_00_type1_off0000b0e8.bin
c6bf78478c9c4dd5b3b86554d34c78f847f70af4118f9ff083c1fccf0e8e932b		 pdf-font-stream PDF embedded font (type1) at offset 0xB0E8 97 bytes
font_01_type1_off0000b371.bin
b749644b3e758e7335900ab2e7499eaa64b3a946849f1f8a0948287bdd96763d		 pdf-font-stream PDF embedded font (type1) at offset 0xB371 144 bytes

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