PDF malware analysis — malicious · b1ae1aa0207948df

MALICIOUS

PDF

584.5 KB

MD5: 177e4243f3ba722b64c4b630fa4017af SHA-1: 03287d600ecc5af6daf0d35513aa408f1e972d8e SHA-256: b1ae1aa0207948dfef2b1c625aa29833992bda7c8c46b530398fa21e65ff0a77

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript and triggers a critical heuristic related to CVE-2007-5659, specifically using the 'collab.collectEmailInfo' function. This function is known to be used to launch arbitrary code execution. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') indicates that the script is likely designed to download and execute a second-stage payload. The U3D content also suggests a potential exploit vector.

Heuristics 6

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
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 12

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0031_000.js` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 31 at offset 0x2CAEA	373 bytes
`legacy_pdfkit_stage_000.js` `31f8c95e1dd8b29929b7d367ec693402e596175afe222226e60aaf3f286604e3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x28063	13354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `65a00ede8f2ff835598360d28c4d825c61048536a0319bf4f818aa249b989f58`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x28063	5633 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`icc_00_off0007d698.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0x7D698	3144 bytes
`font_00_sfnt_off00000e5a.bin` `afeb9e1e920aae3aca3f295f1bbccba46b16423dac14b1b5fde4b661de9198cc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5A	46764 bytes
`font_01_sfnt_off00008483.bin` `5f96e1e90c4ef56487c91d02c05141dca0967f8e2bbd5d67be6c4f381f0afa79`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8483	62160 bytes
`font_02_sfnt_off00011b6b.bin` `d375c22ace40f0b973d7308d85023b2e0e49d40dc51da45552d116868346475e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B6B	37232 bytes
`font_03_sfnt_off000166cd.bin` `b661c2e877dd6b7625208ae148d736aedb24eda2d4f014262cbb7f958f538ca0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x166CD	71216 bytes
`font_11_sfnt_off0006dc7e.bin` `8b62f203a4ab5c2ac76368029c584b4fa12fffc17f3b6e4e43a9997416807d21`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6DC7E	11156 bytes
`font_12_sfnt_off00072f31.bin` `6cf6df6beee88aa138f821122d0c1969b348cebe09cafe5b5f6a7eb8c27107a0`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x72F31	32640 bytes
`font_13_sfnt_off00087781.bin` `95592346b00d039686aa3d7e22eae3d52b011e7e842a5c123f73e89ea766cd35`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87781	22628 bytes
`u3d_00_off000214e6.bin` `48816569ab4f370009a917ef6429edbe09e4dfe8a63b00a0a0f75a904c62ba94`	pdf-3d-stream	PDF U3D 3D stream at offset 0x214E6	27449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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