PDF malware analysis — malicious · f4a6a3ed497c46f3

MALICIOUS

PDF

41.0 KB Created: !Kcò@xNXý_=â{r'îîh¡ Authoring application: $> §ÝCz÷xr

MD5: a4863501ea17b548714b4df43c8d95ff SHA-1: 8db16d29977038cc1ce4ed6da9598159c652bac1 SHA-256: f4a6a3ed497c46f3de2c8a5749ba3bb6ce0c670e04e525e997aceff679c970d3

82 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.001 Phishing: Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file is encrypted and contains JavaScript, a common technique to conceal malicious payloads from static analysis. The presence of PDF_ENCRYPTED_WITH_JS and PDF_JAVASCRIPT heuristics indicates that the JavaScript is likely responsible for decrypting or executing the hidden content. The PDF_IMAGE_ONLY_LURE heuristic suggests a deceptive presentation, possibly to trick the user into interacting with the malicious content.

Heuristics 7

Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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
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
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 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.

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