PDF malware analysis — malicious · 31d4443bd802f694

MALICIOUS

PDF

133.3 KB Created: 2000-01-01 Authoring application: Acrobat Distiller 4.0 for Macintosh

MD5: 434e895befbf1b8252577e2c8e3a8770 SHA-1: d6a3b7ccea1a9fa72f41fb690aa3f64666db65d4 SHA-256: 31d4443bd802f694f958f98f9acfd2f10df6138e0579def11994c225b580eced

394 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

This PDF file contains embedded JavaScript and a PE payload, indicating malicious intent. The critical PDF_LAUNCH and PDF_LAUNCH_COMMAND heuristics, along with the CVE-2010_1240 detection, confirm that the file attempts to execute cmd.exe with specific parameters. This is further supported by ClamAV detections on both the PDF and the extracted artifact, suggesting it acts as a dropper for further malicious activity.

Heuristics 12

Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240

PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD

PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\06086325.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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://doi.acm.org/10.1145/332051.332079

Extracted artifacts 14

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0086_000.js` `19e3fb33409050f42963b4d253d30193d427409f3fc570d48c58481d7e5be997`	pdf-javascript-stream	PDF /JS object 86 at offset 0x21092	57 bytes
`stream_018_off00013024.js` `2d7f1f29ed81490929b4cff075d9aaee86e95d16c1123ba2a37d27e0b893159f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13024	11059 bytes
`stream_028_off000182f5.bin` `09f728520e1e534673d0ef7e707b54ee6c057d6d3ec87f6b0474d80d6aa68ffb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x182F5	79111 bytes
Detection ClamAV: Win.Trojan.MSShellcode-6360730-0 Obfuscation or payload: unlikely
`font_00_cff_off00000fc8.bin` `3ba103feaa935389e9aca5004b7e409adf3890c6f0d979c0f45ce15a72ecd5e9`	pdf-font-stream	PDF embedded font (cff) at offset 0xFC8	1546 bytes
`font_01_cff_off000019a9.bin` `e383026abea5d6076a22fdff61bb21c3df08710d86913079e493937f98714956`	pdf-font-stream	PDF embedded font (cff) at offset 0x19A9	1141 bytes
`font_02_cff_off00002e3e.bin` `6180a385fc3d52804cc8d990b690c6fedee8256227992750be7862bcc2d83a29`	pdf-font-stream	PDF embedded font (cff) at offset 0x2E3E	4759 bytes
`font_03_cff_off000043ac.bin` `7ff142b5ac07f86345b3afd2a09e84e6e92270a7ec2b2dc1a3fcd43a7b60c301`	pdf-font-stream	PDF embedded font (cff) at offset 0x43AC	12303 bytes
`font_04_cff_off000071a8.bin` `cc651472fd6fe2a236670c3084c23589f9294520e5aaa98b4654b900f1f273a1`	pdf-font-stream	PDF embedded font (cff) at offset 0x71A8	8270 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.42, consistent with packed or encrypted content.
`font_05_cff_off0000940e.bin` `d82eb45d01988b1c1a5e743696cdaf4ae1fc7cc47a7b3abc240e01493db8eb6e`	pdf-font-stream	PDF embedded font (cff) at offset 0x940E	5684 bytes
`font_06_cff_off0000ad2c.bin` `5be998d7f9990a8a292369fdd6a218bb1a42f8a34395579c3ecd413dcefb5dde`	pdf-font-stream	PDF embedded font (cff) at offset 0xAD2C	3666 bytes
`font_07_cff_off0000bf26.bin` `bef2db66189d82167ff20c19446cd1965b6e682eb11de527cf35d01344cdd796`	pdf-font-stream	PDF embedded font (cff) at offset 0xBF26	2367 bytes
`font_08_cff_off00012d87.bin` `9ac8be8556bfc64f26722e2077c4131556614ac62d9f1c04a3322a7be81e7e2d`	pdf-font-stream	PDF embedded font (cff) at offset 0x12D87	299 bytes
`font_09_cff_off000146bd.bin` `7274e992ddbbb85cb9eac08c003b61cf8ae49b18b67054823f58703b49640458`	pdf-font-stream	PDF embedded font (cff) at offset 0x146BD	3084 bytes
`font_10_cff_off0001567c.bin` `a899af8eab89b8d8343f2b59c6b1e76b614d05a169c043012baa64c004bf5dd9`	pdf-font-stream	PDF embedded font (cff) at offset 0x1567C	3615 bytes

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