Malicious PDF — malware analysis report

Static analysis result for SHA-256 f48bc5d5bbf6b4d3…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 15:48:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 03fe34556fa506ff1b4001676097a271 SHA-1: 6827d76f0533409e00ef1b8bf267cf38465c76c8 SHA-256: f48bc5d5bbf6b4d37ef46a1c6262f2a1a0f9a13731b6636a92a6cebe6d553875
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including a direct link to a game hack download, and is flagged by ML classifiers as malicious. The document body and extracted URLs suggest a lure for users seeking cheats or free in-game currency, which is a common tactic for distributing malware or engaging in scams. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/406889139/coin-master-unlimited-spin-apk-free-download-game-hack
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-change-roblox-username-for-free_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/pubg-uc-global_GM1330123889.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/is-minecraft-free-on-ps4_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/robux-converter_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-that-really_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-sites_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-tiktok_GM835599320.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/voodygamescom-roblox-hack_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/hack-coin-master-xyz_GM406889139.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-executor-roblox_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-minecraft-account-and-password-generator_GM479516143.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdf
    • https://ekbm.mankotapasuruan.sch.id/__statics/gudangsoal/files/free-minecraft-severs_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031c8.bin
d62976d3a6a62e8d896085c9fb81f65ba166c875018611cdc7d98c181afc3790		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31C8 22768 bytes
font_01_sfnt_off000064f2.bin
8b0685dcc048d8507013793e7e40f4e8e130d168f30120dc551c0829f220b5a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 19368 bytes

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