Malicious PDF — malware analysis report

Static analysis result for SHA-256 828bf5d2ee9e4009…

MALICIOUS

PDF

43.0 KB Created: 2021-05-18 04:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 49c1b968528c8d8749085d5d2e1c95e9 SHA-1: 5086e203d57100559cd3ce19b32ff4e45727c447 SHA-256: 828bf5d2ee9e40093c83c5b04994552627474508fe443cb25db7aa535ae2b27c
102 Risk Score

Malware Insights

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

The document contains lures for free in-game currency and hacks, a common tactic for phishing or malware distribution. The embedded URLs and document body text strongly suggest a phishing or scam attempt, likely leading to credential theft or the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/spins-gratis-coin-master-hoy-game-hack
    • http://tileworld.com.au/files/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://tileworld.com.au/files/free-robux-codes-no-verification_GM431946152.pdf
    • http://tileworld.com.au/files/free-robux-for-kids_GM431946152.pdf
    • http://tileworld.com.au/files/coin-master-free-chip_GM406889139.pdf
    • http://tileworld.com.au/files/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://tileworld.com.au/files/websites-that-give-you-free-robux_GM431946152.pdf
    • http://tileworld.com.au/files/spin-and-coin-link_GM406889139.pdf
    • http://tileworld.com.au/files/roblox-login-hack_GM431946152.pdf
    • http://tileworld.com.au/files/mcpe-com_GM479516143.pdf
    • http://tileworld.com.au/files/give-free-robux_GM431946152.pdf
    • http://tileworld.com.au/files/coin-master-hack-apk-android_GM406889139.pdf
    • http://tileworld.com.au/files/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://tileworld.com.au/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://tileworld.com.au/files/coin-master-free-spins-hack_GM406889139.pdf
    • http://tileworld.com.au/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://tileworld.com.au/files/free-robux-hack-us_GM431946152.pdf
    • http://tileworld.com.au/files/is-free-robux-real_GM431946152.pdf
    • http://tileworld.com.au/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://tileworld.com.au/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdf
    • http://tileworld.com.au/files/coin-master-200-spin-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c3e.bin
6fc029ff3e2617c9465b7648123796e29070b22a3e61ebc979fbd4b960e1d17b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3E 25548 bytes
font_01_sfnt_off000086a5.bin
d9ca9c840088eace307b9f0f2308e23842d7b880bf99d309ad40adeb9b769765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A5 17900 bytes

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