Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c2be4527eafdf4…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 01:25:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4ef7c02e71e16a93f9471ce643d5d256 SHA-1: cbaa65c33a477b65531aa9039a0671b9eaa74917 SHA-256: 63c2be4527eafdf4a7a7ba34048ef590e2520158aea912497a7851da99be3b4b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs pointing to sites offering game hacks and cheats, such as 'roblox-hack-apk-game-hack'. The ML classifier strongly flagged this PDF as malicious, and heuristic analysis identified external URIs and a potential command execution lure within the document text. The primary intent appears to be tricking users into downloading potentially malicious applications disguised as game cheats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://netcdn.tw/app/431946152/roblox-hack-apk-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-2021-android-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-account-to-delete-them_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robuxian-hat-ives-off-1m-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-adidas-hoodie-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/fill-in-form-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-ios-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-phantom-forces-all-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cmd-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22628 bytes
SHA-256: f737e1fb86b04013b48618b6802305a03b8a528fa397b4e33aecd30b70eebc66
font_01_sfnt_off0000651c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 18832 bytes
SHA-256: 306f83865665730cccb200b9769a14693e944a35f37b3076e40f03dcf922f572

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