Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9897764899e6cb4…

MALICIOUS

PDF

33.9 KB Created: 2021-06-22 03:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e541b2716d9f929713ebd8c27f823fbb SHA-1: 73200c65cb635faa3408a529ca6c0a814dbf9a5d SHA-256: c9897764899e6cb4982c27bcc87cfa87996088b91b1627b4bdd7fd2bd52567da
122 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites that appear to offer game hacks and cheats, suggesting a lure for users interested in such content. The ML classifier and PDF link farm heuristic strongly indicate malicious intent, likely to distribute malware or conduct phishing through these external links. The presence of a 'download button' lure further supports this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://netcdn.co/app/431946152/games-that-have-free-robux-game-hack
    • http://arthakranti.org/images/mod-menu-roblox-no-crashing-free_GM431946152.pdf
    • http://arthakranti.org/images/roblox-hack-codes_GM431946152.pdf
    • http://arthakranti.org/images/roblox-how-to-get-free-pets_GM431946152.pdf
    • http://arthakranti.org/images/free-minecraft-svg-cutting-files_GM479516143.pdf
    • http://arthakranti.org/images/roblox-dashing-simulator-hack-script-2021_GM431946152.pdf
    • http://arthakranti.org/images/bit-ly-coin-master-hack_GM406889139.pdf
    • http://arthakranti.org/images/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://arthakranti.org/images/coin-master-hack-no-verification-2021_GM406889139.pdf
    • http://arthakranti.org/images/i-hacked-john-does-roblox-account_GM431946152.pdf
    • http://arthakranti.org/images/coding-script-for-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/inf-jump-hack-script-for-phone-roblox_GM431946152.pdf
    • http://arthakranti.org/images/pokemon-go-free-pokeballs_GM1094591345.pdf
    • http://arthakranti.org/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/free-roblox-account-v3rmillion_GM431946152.pdf
    • http://arthakranti.org/images/make-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/minecraft-free-download-mac-full-version_GM479516143.pdf
    • http://arthakranti.org/images/hacks-para-roblox-para-tener-rubux-infinitos_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-hack-xyz_GM406889139.pdf
    • http://arthakranti.org/images/how-to-get-free-robux-without-paying-any-money_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e15.bin
a33be51d551b8e5f41a382e8edccdbdde87cb13c900bccdd64f3b8e3cfb834d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E15 21896 bytes
font_01_sfnt_off00005e8a.bin
b74157ad8b98defa20b8aa6b64f5e4171a0c36742cea83f92eb68a1b0e17d163		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8A 19360 bytes

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