PDF malware analysis — malicious · b1f3372bd30adb83

MALICIOUS

PDF

202.9 KB Created: 2010-06-10 23:08:24 Authoring application: Advanced PDF Repair at http://www.datanumen.com/apdfr/

MD5: 519f5339fe147e6f16eb1ba2778ca008 SHA-1: 9f46d7a3c6871f668e0109c21741fe287a82ce0f SHA-256: b1f3372bd30adb83ac051f09287a8c8d5ed16da2aac565aaf764cde2cc3470b0

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a Flash object, which are commonly used to exploit vulnerabilities in PDF readers. The ClamAV detection 'Pdf.Exploit.Agent-35955' and the critical heuristic 'POLYGLOT_CHILD_PDF_STATIC_TRIAGE' indicate a high likelihood of exploit activity. The embedded JavaScript, though partially truncated, likely facilitates the download and execution of a secondary payload, as suggested by the presence of embedded files like 'pad.swf' and 'javascript_obj0005_000.js'.

Heuristics 10

Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www.datanumen.com/apdfr/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`pad.swf` `c8a20e8ded0e5fe8a6a5cddff2408ac7f8a83df3f18abea5748cc817f3a3ebb9`	pdf-embedded-file	PDF EmbeddedFile object 27 at offset 0x2326	26810 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0005_000.js` `1db9512c39e2b5c9126a845c30e38045bb8261cd5c4f164cff26bbe093fbf5c1`	pdf-javascript-stream	PDF /JS object 5 at offset 0x361	4201 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`polyglot_child_pdf_off000298bc.pdf` `bac0e185543dbd30578a73252f10fec67f4a8f8f4e324af271fb03524d666c6e`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x298BC	37552 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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