Malicious PDF / .TXT — malware analysis report

Static analysis result for SHA-256 d6739da7cc96f52f…

MALICIOUS

PDF / .TXT

3.4 KB
MD5: 848667ce348cd473511fd92f6ee41386 SHA-1: 5c012dc7686ca526bc412187f75d3a4aca83160f SHA-256: d6739da7cc96f52f6b45c3fbd1687b34b4399cc9e53de4ad05edc940c60bbd72
78 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

The sample is a PDF file that utilizes XFA forms and the ASCII85Decode filter, both indicators of potential exploit delivery. The critical heuristic firing confirms the presence of the CVE-2010-0188 exploit, targeting a vulnerability in Adobe Reader's handling of LibTIFF XFA images. This exploit is embedded within the PDF's decompressed stream, indicating the document is designed to compromise the user's system upon opening.

Heuristics 4

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off000001e9.bin
43d17cea1943d5e025687cb17dc795226381f9506c21a34259f6d53969f4d10b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1E9 13469 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).