Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdb2a639df029d7…

MALICIOUS

PDF

41.1 KB Created: 2021-05-11 13:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 41affe49a79b0795ebb4afea11c558a2 SHA-1: 7098b439adb40d39bec17c5d527cf11227542d8d SHA-256: 5bdb2a639df029d7d6d08ef66ff098d32f973e650d5c52babd45e2c8a22e2103
122 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a prominent call-to-action related to game hacks, combined with a heuristic indicating it requests recovery secrets. This suggests a phishing or scam attempt designed to trick users into downloading potentially malicious files or revealing sensitive information. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/card-hack-for-coin-master-game-hack
    • http://ivpr.net/images/60-free-spins-on-coin-master_GM406889139.pdf
    • http://ivpr.net/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://ivpr.net/images/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://ivpr.net/images/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://ivpr.net/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://ivpr.net/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdf
    • http://ivpr.net/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://ivpr.net/images/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://ivpr.net/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://ivpr.net/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdf
    • http://ivpr.net/images/free-spins-coin-master-twitter_GM406889139.pdf
    • http://ivpr.net/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • http://ivpr.net/images/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://ivpr.net/images/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • http://ivpr.net/images/how-to-exploit-roblox_GM431946152.pdf
    • http://ivpr.net/images/free-robux-hack-2021_GM431946152.pdf
    • http://ivpr.net/images/hack-coin-master-without-human-verification_GM406889139.pdf
    • http://ivpr.net/images/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://ivpr.net/images/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • http://ivpr.net/images/i-want-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047be.bin
2362e6790310b6cf3735b239988ef22d2676b183fe8934a70bb122b789844a61		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BE 24116 bytes
font_01_sfnt_off00007ed4.bin
16c04f841c276c9143b9cdeba32c018779ebf720d5ca55aa256a698217b90b2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED4 18056 bytes

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