PDF malware analysis — malicious · cfaf6bfbfee0ba45

MALICIOUS

PDF

63.0 KB

MD5: bbcd18956102fd46f3a205a10efbf98e SHA-1: 3ccb780de26b1e33824e177b0940d6a1489a7eea SHA-256: cfaf6bfbfee0ba45d08d1e0a33f79efeb5bdad2562e8d511657f7c359d01bcba

304 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to automatically execute code upon opening. The critical heuristic firing for CVE-2010-0188 confirms the exploitation of a known vulnerability in Adobe Reader related to XFA forms. The embedded JavaScript stream and the ClamAV detection of 'Win.Trojan.Agent-36103' further support the malicious nature of the file, likely serving as a downloader for additional malware.

Heuristics 13

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: Win.Trojan.Agent-36103 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36103
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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.
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
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.
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
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `5053e47b589a018eff81c8a41cc46115deda2b17fe4e6e754baeee222cb60567`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x408	33430 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0012_000.js` `784a3219af11daf98cf784bdaa900f32438c4c8b6061e0866e5c359d349d6031`	pdf-javascript-stream	PDF /JS object 12 at offset 0xD19D	8389 bytes
Detection ClamAV: Win.Trojan.Agent-36103 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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