PDF malware analysis — malicious · a0b71eea1c77dc34

MALICIOUS

PDF

5.3 KB Created: 2011-04-05 23:46:28 Authoring application: bfub loab

MD5: 3566b8042811e251b6c8b5ee7a935d23 SHA-1: 92d5fc5e13ea7b6b2c0b8a1696bfd349013550c2 SHA-256: a0b71eea1c77dc3420f605b388fc4e5f8be835673ac5ce4cb9a38bfa28540b3a

210 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file that contains a critical vulnerability for CVE-2010-0188, related to Adobe Reader's handling of XFA forms and LibTIFF images. This indicates the file is designed to exploit this specific vulnerability upon opening in a vulnerable application. The ML classifier also strongly flagged this PDF as malicious. No scripts were directly extracted or readable, but the exploit itself is the primary indicator of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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.
XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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
`stream_001_off00000334.js` `83775c07a83bf6129de1a4931c271a455160a2bb38931b71b968e1d65279ef31`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x334	56130 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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