PDF malware analysis — malicious · a664dda21b3fc5c0

MALICIOUS

PDF

79.7 KB

MD5: b5a477dbaae524fe980237c7a0417397 SHA-1: 318e38909ba0bc9dcfcfaaed9d90676040d0ab09 SHA-256: a664dda21b3fc5c02f28a9bc2eeca32bae7a4932d90477e3b63ea4aa1d62b316

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains an embedded XFA form with a payload targeting the LibTIFF component of Adobe Reader, specifically exploiting CVE-2010-0188. This indicates the file is designed to execute arbitrary code upon opening in a vulnerable version of Adobe Reader. ClamAV also detected this file as Pdf.Exploit.Dropped-90, further confirming its malicious nature.

Heuristics 7

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.
ClamAV: Pdf.Exploit.Dropped-90 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-90
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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.

Filename	Kind	Source	Size
`embedded_file_obj0001.bin` `41f0549fd7701d9bafb0466fb31c5f35ea5fbd5f91cb6cffce8ca9e9fb98e199`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x5B	13415 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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