Malicious PDF — malware analysis report

Static analysis result for SHA-256 714cd46ebca7b69c…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 19:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 357ff379d8888d83d920101513e180b6 SHA-1: 8e36014196c489009f25eb6ee4d5ab990fba6888 SHA-256: 714cd46ebca7b69cb05a64a19ebaef9c28b442378ac4e7ce9e992277e693608d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document contains multiple embedded URLs and references to game-related hacks and free currency, suggesting a phishing or scam attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates potential execution of commands, possibly to download and run a second-stage payload from one of the provided URLs. The ML classifier strongly flags this PDF as malicious.

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/406889139/coin-master-links-free-spins-game-hack
    • https://fib.ub.ac.id/sac//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-hack-in-somebodys-roblox-account-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/where-to-get-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/free-texture-packs-for-minecraft-pe_GM479516143.pdf
    • https://fib.ub.ac.id/sac//repository/roblox-2021-hack_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdf
    • https://fib.ub.ac.id/sac//repository/100-free-spins-coin-master_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/bloxfree-roblox-hack_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-cmd_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-roblox-clothes-and-items_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-2021_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-hack-scripts-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-sharkbite-free-submarine-script_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/is-minecraft-realms-free_GM479516143.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-robux-for-free-instantly_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-instantly_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/pubg-75-uc_GM1330123889.pdf
    • https://fib.ub.ac.id/sac//repository/roblox-hack-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-spin-and-coins-free_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/free
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ce.bin
6d15977f5297e6e45cf9063d5841dcf063e1d1e00ae07978aff6ea413f270f86
pdf-font-stream PDF embedded font (sfnt) at offset 0x31CE 23452 bytes
font_01_sfnt_off000066e4.bin
6ad1108e81c5525844192ddb13ab38111abd218b87fc7994796a13e0178d8bfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 18344 bytes