Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bef265e6efee5c…

MALICIOUS

PDF

1.00 MB Created: 2007-07-11 13:49:20 -04:00 Authoring application: Photoshop_Album
MD5: 6c14c6f3967cd68576a5d15b4118a6f9 SHA-1: 0c486afed2463066d8821fe5ed461f786a92a32a SHA-256: 59bef265e6efee5c3e11f84a80f643810965360ad0cce100b7c0bca218a38805
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link T1566.002 Spearphishing Attachment

The PDF contains embedded JavaScript with eval() calls and String.fromCharCode, indicating obfuscated code execution. A visible LOLBin command execution instruction and a call-to-action button suggest the document is designed to trick the user into downloading and running a malicious payload. The embedded JavaScript and file are likely part of this malicious workflow.

Heuristics 13

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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.
  • 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
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.adobe.com/albumreader)/Next
    • http://www.adobe.com/imageviewer)/Next
    • http://www.adobe.com/getpsalbumstarteredition)/Next
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.apple.com/DTDs/PropertyList-1.0.dtd
    • http://www.adobe.com/AdobePhotoshopAlbum/template
    • http://ns.adobe.com/AdobeSVGViewerExtensions/4.0/
    • http://www.w3.org/2000/svg
    • http://www.w3.org/1999/xlink
    • http://ns.adobe.com/Extensibility/1.0/
    • http://ns.adobe.com/AdobeIllustrator/10.0/
    • http://ns.adobe.com/Variables/1.0/
    • http://ns.adobe.com/Flows/1.0/
    • http://ns.adobe.com/pdfx/1.3/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0094.bin
8a5688ed58fb63d62aabff74209c06afa2bff6c6d108fa35ef5b64f8d578607f		 pdf-embedded-file PDF EmbeddedFile object 94 at offset 0xEF69F 67549 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 10 eval/decoder/string-building token(s).
javascript_obj0102_001.js
b081b3708dce88eee2fa772e45ca44ad95c31aa5ad0f31d844d94358e53e10d7		 pdf-javascript-stream PDF /JS object 102 at offset 0x95D 3542 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
stream_001_off0000241e.bin
e277eed0d3ead5ded8565d31acda666252038c7de866ddf9e161126dcc9ec77f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x241E 1322100 bytes
font_00_cff_off00015f1b.bin
8cde6991bc9606c619ff9f4f7b725327c7eb0ba239bdad78d693fba794855bd3		 pdf-font-stream PDF embedded font (cff) at offset 0x15F1B 1473 bytes

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