PDF malware analysis — malicious · a404337346582ea2

MALICIOUS

PDF

11.5 KB Created: 2010-09-14 18:03:25 +04:00 Authoring application: LEwIWR_ (via 5c5bbe)

MD5: 8f2045279de5eec5297086cfc8704374 SHA-1: 4b4f189f3c00c4a56267e75b3868e2bc7dfe3ba0 SHA-256: a404337346582ea2d73948603b17319f7e3b088b42e3fd787ae26a5708acd744

74 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, with one stream exhibiting an eval() call, indicating code execution. The presence of multiple JavaScript objects and the use of String.fromCharCode suggest obfuscation techniques common in malware delivery. The primary function of the embedded scripts appears to be the execution of arbitrary code, likely to download and execute a further stage of the attack.

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
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. (matched inside decoded stream)
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `9707023fb365f0b5ceba064c48c3cb1783f42093f0987be22ba5882c7f0f4fbf`	pdf-javascript-stream	PDF /JS object 11 at offset 0x248B	1124 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `cb05dc76ab7463ae9282404310df91f3a6565a956602272b00a420b24d6ae720`	pdf-javascript-stream	PDF /JS object 13 at offset 0x2728	493 bytes
`javascript_obj0015_002.js` `cbedb3a8c15e739057451f791f1305c5a1a3660f48e99365d1a7c81d8efd39eb`	pdf-javascript-stream	PDF /JS object 15 at offset 0x28C9	132 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.