Malicious PDF — malware analysis report

Static analysis result for SHA-256 448854d468806d79…

MALICIOUS

PDF

44.4 KB Created: 2021-05-17 16:49:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8c3c2b1f13fc7f6d4aacc68123ebf7ec SHA-1: a7dbb92aeb760e162a69ccdc35a1fe83d333753b SHA-256: 448854d468806d79d3e9bad110d4bf83300a5a5162efad0d42700912f90ba9dc
62 Risk Score

Malware Insights

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

The PDF document contains a clear lure related to game cheats ('Coin Master Free Spins 2021 Hack') and embeds a URL pointing to a similar application. The presence of a visual download button and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading a payload. No scripts were extracted, but the embedded URL is the primary indicator of a potential download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.xyz/app/406889139/coin-master-free-spins-2021-hack-game-hack
    • http://feuerwehr-rheinau.de/images/robux-no-human-verification_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/worst-roblox-avatars_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/flame-gg-free-robux_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/free-roblox-gift-card_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/how-to-get-robux-fast_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/wurst-minecraft_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/free-robux-for-kids_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/free-robux-now_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/hacked-roblox-accounts-list_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-free-spin-app-2021_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/free-attacks-on-coin-master_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/minecraft-logo-maker-free_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/roblox-admin-hack_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/free-coins-on-coin-master_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-unlimited-spins_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/free-coins-coin-master-no-human-verification_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/inappropriate-roblox-games_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/roblox-hack-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000480d.bin
a5b48863cdbc835378b6e8a09941186e6ccaee00725480f10e55b1544876dec1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480D 24588 bytes
font_01_sfnt_off000080a4.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 2840 bytes
font_02_sfnt_off00008a55.bin
01aac8443e047fcb7357b1b8ecb4a3fbe01c6e1da05f82155595583d2ef12cbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A55 18456 bytes