PDF malware analysis — malicious · a91157f6b9813e03

MALICIOUS

PDF

122.3 KB Created: 2007-04-07 14:38:05 UTC Authoring application: Acrobat Distiller 4.05 for Windows

MD5: 1f36817dc2954405a29a3bc6aeea5664 SHA-1: 26356c678413830922f86f896b21123bb90997e0 SHA-256: a91157f6b9813e03fa9021694c7ff4fc709629474dfaf9b0b7bd8f762f1e3738

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains multiple embedded JavaScript streams, with one stream exhibiting eval() calls and ML classification flagging it as malicious. The presence of JavaScript actions and embedded JS streams, combined with the ML score, indicates a high likelihood of malicious intent. The script's purpose is inferred to be the execution of further malicious code, potentially through obfuscated JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 0.7891

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low 1 related finding 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.
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
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.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 23

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0098_000.js` `87b473ce70c9228c80c80935ff6724a7a159c26f0d27bed1676f18ea1f6de784`	pdf-javascript-stream	PDF /JS object 98 at offset 0xFF7	138 bytes
`javascript_obj0167_001.js` `b9122b4565950ac192ee1052575e439b51edce2b995128e9d1237602e6f82807`	pdf-javascript-stream	PDF /JS object 167 at offset 0x126FF	34 bytes
`javascript_obj0168_002.js` `52011416a458c8279d38f8cf1c17ce225d4c5fdf444265e34e3abb588280acfb`	pdf-javascript-stream	PDF /JS object 168 at offset 0x12749	35 bytes
`javascript_obj0174_003.js` `d329fc89f18b6cb97d018e3ae694eeb99a19378532ad120d658ed85d7c2ade87`	pdf-javascript-stream	PDF /JS object 174 at offset 0x12F7E	213 bytes
`javascript_obj0185_008.js` `19057f9f222d49fdca3560b5c97e17d32cdc47ba686d03bea00fb381aac62c17`	pdf-javascript-stream	PDF /JS object 185 at offset 0x13340	33 bytes
`javascript_obj0186_009.js` `1c84c437503e05ac5400760fdae3efa7ef1e1f4bca451dbe031a6deb63310391`	pdf-javascript-stream	PDF /JS object 186 at offset 0x13389	34 bytes
`javascript_obj0198_011.js` `5fff2c97c1f133b69d891c8e00092d361f5cb3fbaddc5fd34fd53b9fe71add0d`	pdf-javascript-stream	PDF /JS object 198 at offset 0x13BDB	48 bytes
`javascript_obj0202_012.js` `0754db8e26c8ae53a12fe23791d868e084ea489a2c7feaa23537b3e7d7d6668c`	pdf-javascript-stream	PDF /JS object 202 at offset 0x13DBD	86 bytes
`javascript_obj0030_015.js` `26bce592e4bcddbe6a32dd757196a8dd48febe02b79b0b40cacce8ef5e3d88d6`	pdf-javascript-stream	PDF /JS object 30 at offset 0x1ACB6	688 bytes
`javascript_obj0037_016.js` `5082bcc1b1f9711d3c541a98123c63bd9fa63486704a574c1d423c180c7c9d98`	pdf-javascript-stream	PDF /JS object 37 at offset 0x1B20B	296 bytes
`javascript_obj0088_017.js` `488d146717b23eb8004388e72a398c124cd079d65dfc76df7d2380bb827ae223`	pdf-javascript-stream	PDF /JS object 88 at offset 0x1DE12	565 bytes
`javascript_obj0104_018.js` `eb6f39e215c39613dc0323bd466a93e50bf841f69ab16dba3e2c622893dcb07a`	pdf-javascript-stream	PDF /JS object 104 at offset 0x1199	1682 bytes
`javascript_obj0105_019.js` `4a27be701b46a16950b39bfb75271b0b43849b2a72cd2143070f8e49a163e903`	pdf-javascript-stream	PDF /JS object 105 at offset 0x13E8	1351 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0106_020.js` `19850ebca5dbcb0c1d8241dd98da17f45d6a763064cdc7e0749ed5f82791d146`	pdf-javascript-stream	PDF /JS object 106 at offset 0x15F9	887 bytes
`javascript_obj0107_021.js` `7e8a6dc55ba2874fb9b17552b8ce2079c91dbf804ce3b95a002ae5d44275efcd`	pdf-javascript-stream	PDF /JS object 107 at offset 0x17CB	3299 bytes
`javascript_obj0108_022.js` `5850f36341a6eda824fd8dfeb1427224d6618a91e52a1120c9c47e529491542f`	pdf-javascript-stream	PDF /JS object 108 at offset 0x1CF7	1154 bytes
`javascript_obj0109_023.js` `4937fa5476556b4c1144187ddc04215eae3f34b968eb6d0dd865964cd6d52ff9`	pdf-javascript-stream	PDF /JS object 109 at offset 0x1F85	679 bytes
`javascript_obj0110_024.js` `5d1b53ad09bf8f559091f524aa947af156a191e0eeeea9497ab2bfaf15447c17`	pdf-javascript-stream	PDF /JS object 110 at offset 0x212E	1934 bytes
`javascript_obj0111_025.js` `a0021eba2d9841d837ba9ca37bba2fb1b0a490ebaa153a2bf6346a7105151d3d`	pdf-javascript-stream	PDF /JS object 111 at offset 0x2407	738 bytes
`javascript_obj0169_026.js` `d73fdb4694d7391e5b1beed2b05c068b3687145044153a826804adac9b5e8b9a`	pdf-javascript-stream	PDF /JS object 169 at offset 0x12794	1365 bytes
`javascript_obj0173_027.js` `949c563f9f514a771ef6beaaae039e87224d5f5266e3f54e2373e4b3b359931d`	pdf-javascript-stream	PDF /JS object 173 at offset 0x12B21	2535 bytes
`javascript_obj0193_028.js` `336d4c595a49351c3600274f8a059bd127025fc217272ef23193ed9eee05ac9a`	pdf-javascript-stream	PDF /JS object 193 at offset 0x13563	649 bytes
`stream_010_off000037f6.bin` `e254f5633f8f32426a68ec463baee46e8c0a027fe2788cab1e596e4810cf5b99`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x37F6	129618 bytes

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