Malicious PDF — malware analysis report

Static analysis result for SHA-256 894e5579cbd3cb8f…

MALICIOUS

PDF

44.3 KB Created: 2021-05-19 11:36:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1452fb8608a82ae04ea655d1d50d7d8e SHA-1: 3d07e53f92650c7603354950e3848c0847c64618 SHA-256: 894e5579cbd3cb8f4b123f39845b01f0367527b69950751f07746c299fd79331
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent external URI pointing to a download page for a 'Coin Master Spin Free Game Hack'. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful software. The document body, though heavily obfuscated, contains references to the malicious URL and game-related terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-spin-free-game-hack
    • http://androidthai.in.th/images/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://androidthai.in.th/images/free-robux-without-verification-2021_GM431946152.pdf
    • http://androidthai.in.th/images/free-minecraft-bedrock-server_GM479516143.pdf
    • http://androidthai.in.th/images/is-it-possible-to-hack-coin-master_GM406889139.pdf
    • http://androidthai.in.th/images/spin-coin_GM406889139.pdf
    • http://androidthai.in.th/images/coin-master-free-mighty-lion-card_GM406889139.pdf
    • http://androidthai.in.th/images/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • http://androidthai.in.th/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://androidthai.in.th/images/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdf
    • http://androidthai.in.th/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://androidthai.in.th/images/free-robux-mobile_GM431946152.pdf
    • http://androidthai.in.th/images/minecraft-book-collection_GM479516143.pdf
    • http://androidthai.in.th/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://androidthai.in.th/images/free-minecraft-alt-accounts_GM479516143.pdf
    • http://androidthai.in.th/images/roblox-com-r_GM431946152.pdf
    • http://androidthai.in.th/images/today-free-spin-coin-master_GM406889139.pdf
    • http://androidthai.in.th/images/robux-hack-me_GM431946152.pdf
    • http://androidthai.in.th/images/free-roblox-com_GM431946152.pdf
    • http://androidthai.in.th/images/roblox-adopt-me-hack_GM431946152.pdf
    • http://androidthai.in.th/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://coinmasterspinandcoin.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a9.bin
a1ec3fa60d69fa24386b123d009f8c57e47d25e001b96b1eb0ff77f8d6a656f8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A9 24524 bytes
font_01_sfnt_off000081b0.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
pdf-font-stream PDF embedded font (sfnt) at offset 0x81B0 2880 bytes
font_02_sfnt_off00008b9a.bin
f64f8d8cd546afe107dcd88d9ce91258665e3d619825ef5ba403a2abc0c27184
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9A 17884 bytes