Malicious PDF — malware analysis report

Static analysis result for SHA-256 c556970e3abaf2d5…

MALICIOUS

PDF

46.6 KB Created: 2021-05-11 15:33:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 98387979e163c7b0f5f0df63a6b6374a SHA-1: 77f6a5f34ed7d389ec5f5b62f4d6a653ed89a8da SHA-256: c556970e3abaf2d51718e27b59ea29bc2c9d83a1f91e4ee05df58c86b818d55d
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link disguised as a guide to obtaining free in-game currency, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the document's content suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/how-to-get-free-coins-on-flip-master-game-hack
    • http://perpustakaan.pn-raha.go.id/repository/master-coin-master-free-spin_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-shirt-roblox_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-roblox-gear_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/roblox-promo-codes-2021-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/what-is-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-menu_GM479516143.pdf
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-spin-and-coins-free_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdf
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/rbxfree-com-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-ad_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/roblox-com-hack_GM431946152.pdf
    • http://perpustakaan.pn-raha.go.id/repository/free-coins-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e37.bin
f3fc37253faa822dca0969f0a03b54ea0737a3d93927ae5dd3b5428ce4575afa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E37 25140 bytes
font_01_sfnt_off00008785.bin
d36d529b7c516d4556cff9289e20797a41abe86998247c34ed5ed89593e15525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8785 3664 bytes
font_02_sfnt_off0000946f.bin
f732bea565dca091e78787654c5995a58c911ad6d414585fdaaa80a3527f7235		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946F 18124 bytes

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