Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b988857dbb1b2ee…

MALICIOUS

PDF

41.9 KB Created: 2021-05-11 07:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 61e5fe585e9ab5b58dfbc1cc17407b3d SHA-1: 09200348499338a25b962b3c967ce102df774564 SHA-256: 4b988857dbb1b2ee64585d5896a2d362708d05f4828c529c286def5c3e99c493
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related cheats and hacks. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially malicious websites. The document body, though heavily obfuscated, contains references to game hacks and a URL that aligns with the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-gold-cards-free-2021-game-hack
    • http://www.perpusffup.or.id/repository/robux-hack-no-verification_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/coin-master-cards-hack_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/easy-way-to-get-free-robux_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://www.perpusffup.or.id/repository/minecraft-texture-packs-free-download_GM479516143.pdf
    • http://www.perpusffup.or.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/robux-hack-no-human-verification_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/google-coin-master-free-spins_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/roblox-generator_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/descargar-hack-coin-master_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/master-free-spins-and-coins_GM406889139.pdf
    • http://www.perpusffup.or.id/repository/free-robux-generator-no-verification_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/free-robux-on-ipad_GM431946152.pdf
    • http://www.perpusffup.or.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487f.bin
83435a9af4a53a216359835d399bb74a657975109987f3945b8215ba35afe39a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487F 24556 bytes
font_01_sfnt_off0000811a.bin
d5f784e8d5b6a4d28f0062806331642ef98a482c4c05a0dd4c725f7b2a97d1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 18360 bytes

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