PDF malware analysis — malicious · 39a53810fb38e47b

MALICIOUS

PDF

92.7 KB

MD5: 36a41f0de1bd411f73f93b5b2e458697 SHA-1: e5fdc2412af17c657f95384d636b4aa06a012060 SHA-256: 39a53810fb38e47b27fd850b4d112add102e1ae7d4310e0bd31f7778337f28ab

160 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1566 Phishing T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file contains an embedded object and triggers critical heuristics for CVE-2010-0188, indicating it exploits a vulnerability in Adobe Reader's handling of XFA forms and TIFF images. ClamAV also detected it as Pdf.Exploit.Dropped-90. The attack pattern is likely a phishing attempt using a malicious PDF to exploit the reader.

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` `973cf6941e9fc2983633615c300547e19b76d2a99998e6d9d0ecb38bb0108f48`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x5B	13414 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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