Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c188e5b14d7ac9…

MALICIOUS

PDF

49.0 KB Created: 2021-06-03 14:02:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f08f1d8cd9b7a50f96965ce47febbfe9 SHA-1: e73e90465a519b874f1714d0ab3a2a0d5ba11563 SHA-256: b4c188e5b14d7ac99b0d0b880c718452c02f1f33aaa69d77d452db070af86fb7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains heuristics indicating it's a lure for downloading files and potentially installing remote support tools. The presence of an external URI pointing to 'netcdn.online' suggests a download attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://netcdn.online/app/479516143/114-hacks-game-hack
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/7-year-old-roblox_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-without-download-apps-or-survey_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-roblox-hair-codes_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coinmasterfreespinlink_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/roblox-demon_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-codes-2021_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-spins-link_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/flip-master-free-coins_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/tiktokexe-free-download_GM835599320.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/how-to-earn-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/haktuts-coin-master_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/coin-master-free-spins-apk_GM406889139.pdf
    • http://perpustakaan.bkkbnkaltim.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c1.bin
84712358bbce1d466174121bd14ef1e0898fb287c495baf24d0bdd820918ddd8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C1 28468 bytes
font_01_sfnt_off0000943b.bin
3bf38ccea0f059764ae863929582790583b2dd886e86d92a85837ff3e16544f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x943B 3056 bytes
font_02_sfnt_off00009eb0.bin
adae08d9b008a520cb66bc6de6376e80f8d95342f8060c976aee239a133cf7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB0 17684 bytes

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