Malicious PDF — malware analysis report

Static analysis result for SHA-256 934a4d725ee0b856…

MALICIOUS

PDF

11.1 KB
MD5: 92569a7c3c59e3294cb6474c5b36231e SHA-1: 7bdff48dbd1d29e31fbd03fdc9d8405560cd5765 SHA-256: 934a4d725ee0b856b341004495aa223266d1459bae3c1cbb07beda335dbf39ca
86 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 JavaScript

The PDF file contains an embedded JavaScript file that exploits CVE-2010-0188, a known vulnerability in Adobe Reader. This exploit is designed to download and execute a second-stage payload. The presence of an embedded file and an XFA form further support the malicious intent.

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.xfa.org/schema/xfa-locale-set/2.1/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0041.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb
pdf-embedded-file PDF EmbeddedFile object 41 at offset 0xEE4 85 bytes
embedded_file_obj0042.bin
dda0835df994b8be920f715db36452f6cee7bb42bbc9c897f878a7b298ba8e91
pdf-embedded-file PDF EmbeddedFile object 42 at offset 0xF96 1029 bytes
embedded_file_obj0095.bin
bee61030b1c09a5aa9b514ada0691a0a378e5a5dba95b745b3d0b71fdbb9e356
pdf-embedded-file PDF EmbeddedFile object 95 at offset 0x11AF 13014 bytes
embedded_file_obj0044.bin
3dd68f00f4fcb366a2a3a17c65cb2626eeddf5ea5713302d374310561d810169
pdf-embedded-file PDF EmbeddedFile object 44 at offset 0x26DF 144 bytes
embedded_file_obj0045.bin
10c03f88a5f0a0833dc5b2c8ac295b3a3c6f65e23889eb8cc1dc6fe29bf7f275
pdf-embedded-file PDF EmbeddedFile object 45 at offset 0x278C 77 bytes
base26_stage_000.js
0b35ccef0eaf0c6b370e2438538749fbcdf1ef94c2df7187b1c5fab92819435a
deobfuscated-js base26-decoded JavaScript (decompressed) at offset 0x13A5 4492 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).