Malicious PDF — malware analysis report

Static analysis result for SHA-256 380c4eeb07848ab9…

MALICIOUS

PDF

936.2 KB Created: 2008-11-05 15:52:18 -05:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 7.0 (Windows))
MD5: 964290f21396bbbd6e2ab6e1097cbd52 SHA-1: 5542b268986897b55f638f9126b552564e46b121 SHA-256: 380c4eeb07848ab9be4c01b9fdbbe90a3f64970cc811eef8bd490d2527189c57
440 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 User Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell T1105 Ingress Tool Transfer

The PDF file contains JavaScript and a launch action that targets cmd.exe, indicating an attempt to execute arbitrary commands. This is further supported by the CVE-2010-1240 heuristic, which specifically flags this type of exploit. The embedded PE payload and ClamAV detections confirm the malicious nature. The primary attack vector appears to be exploiting a vulnerability to download and run a secondary payload.

Heuristics 13

  • 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\\file.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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 14

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0403_000.js
a51396c74bd43c70b96b2f055287709b214cf3f847ffcb3878ffc071376c425d		 pdf-javascript-stream PDF /JS object 403 at offset 0xE9AD1 53 bytes
stream_009_off0000a5c4.bin
e5ab7a45a3e13c4e4eb82fff2da6b5e8e905a152732627a885f93d3786997015		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA5C4 47052 bytes
stream_083_off0008f1a5.bin
f90a10df471862cd0172ff0efb498a252df22508d37edd8b84423d7ea4c8d08d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8F1A5 34352 bytes
stream_084_off0009b146.bin
413c78f91bd39e134f3c0bb204b1d5a90f29df9efddc8fd26950a178058d5d74		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9B146 367112 bytes
stream_145_off000e4dec.bin
bb262130dd9e8b17bf2ea14e09e0c1c85af067cfed9f53a17315e4800cc26481		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE4DEC 37888 bytes
Detection
ClamAV: Win.Trojan.Rozena-131
Obfuscation or payload: unlikely
icc_00_off0006d831.icc
2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e		 pdf-icc-profile PDF ICC profile at offset 0x6D831 3144 bytes
font_00_cff_off00001559.bin
f7e2e9bfafd0652df5839d9c26f59ab9990bb39896d6712f61b38dc370e7c5f2		 pdf-font-stream PDF embedded font (cff) at offset 0x1559 7446 bytes
font_01_cff_off00002f84.bin
3a2018c8664960654168e38c892c5447cda78961dab5cca0a31a78ccf1ee7c03		 pdf-font-stream PDF embedded font (cff) at offset 0x2F84 1704 bytes
font_02_cff_off0000370e.bin
9df0a2646412cc5259ae0cefc451bcf95d77deceaf88e9c71726ad76c6e9cc6c		 pdf-font-stream PDF embedded font (cff) at offset 0x370E 2169 bytes
font_03_sfnt_off00007597.bin
29962898483da4f1e780897582c7e890b8e134bd95fa3af2aa6ab753a03c813a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 22100 bytes
font_05_sfnt_off0006e72c.bin
93be4f311f91cd945c729ae8825330cd583d2f66992cf62705db9229f8542b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E72C 30860 bytes
font_06_sfnt_off00072043.bin
0a45a0cb62c95dfb945728b5a64a6cdcd660c5ce507ced26e1197733fb340e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72043 436156 bytes
font_07_sfnt_off00084f4a.bin
7039d96833314c529f7fefd443cebc36e4394f202dd4c7e16b5a21771e8ddb6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4A 30744 bytes
font_08_sfnt_off0008c222.bin
5e473e39bf4739e2a7cfa7bed2da7a4baab8d3381a34090521730fc7929d14f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C222 21424 bytes

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