PDF malware analysis — malicious · 835a4bea24bb1757

MALICIOUS

PDF

6.0 KB Created: 2012-09-23 16:04:16

MD5: 9e62d0867c69e68ef311572a41289bca SHA-1: 00fe48c1c537fe3ea86fdb1938bcf74e8aa6e131 SHA-256: 835a4bea24bb17574780390276445609aa28d93c0ee00a6ea1d67810ed62137b

70 Risk Score

Malware Insights

MITRE ATT&CK

T1553.005 Mark-of-the-Web Bypass T1204.002 Malicious File T1027 Obfuscated Files or Information

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains multiple embedded files, one of which is significantly larger than the others and is likely the primary payload. The presence of embedded script payloads further indicates a malicious intent to execute code upon opening.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. 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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0007.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x20B	130 bytes
`embedded_file_obj0011.bin` `6495c01ee24d720320d447c026ed0b79eb81f5ae726d2a4e048461e9d043c389`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x479	118 bytes
`embedded_file_obj0005.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x54E	77 bytes
`embedded_file_obj0009.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x5F7	56 bytes
`embedded_file_obj0017.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x700	201 bytes
`embedded_file_obj0018.bin` `7f0590daae2937ead346800eb05ca54a4e735eabad1786cee57ed8cd0f233cb6`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xA51	35791 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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