Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b5dc78230dda44…

MALICIOUS

PDF

47.5 KB Created: 2021-06-04 02:50:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 504c1bb08c486f4cf66de901f4fbce1c SHA-1: 4f7f91db460446c0f243420c42fefca3a867c7b5 SHA-256: e0b5dc78230dda443f77304b0ceee3262438f7a73452bdd395181a83f19d5eff
62 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a call-to-action lure, indicating an attempt to trick users into downloading external content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple suspicious URLs suggests a phishing or scam campaign. The document body, though partially corrupted, contains references to 'Free Robux' and 'game hack', aligning with common lure themes for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/free-robux-no-verification-2021-android-game-hack
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-videos_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/minecraft-java-hacks_GM479516143.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/get-free-spins-coin-master-link_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-hack-app-download-free_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/game-give-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/rbx-com_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-not-fake_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-change-username-on-roblox-for-free_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/hack-minecraft_GM479516143.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-root-hack_GM406889139.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/i-want-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/can-i-get-robux-for-free_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-apk-hack-3527_GM406889139.pdf
    • https://www.nrzroblox.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c9.bin
c170f9e368bda4ab018dbc554cbd90c0646bbe8e2b82ab1308e311cc4157bc95		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C9 28208 bytes
font_01_sfnt_off0000945b.bin
2db8195158682863467aa5049c27493158ce29af4e73d213a7d216c5b0c72741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945B 19176 bytes

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