Malicious PDF — malware analysis report

Static analysis result for SHA-256 392498ba97e3776f…

MALICIOUS

PDF

47.9 KB Created: 2021-05-13 06:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b34ca1393c079b156fa7deb9341a56fb SHA-1: d01e1775845711f59d3ea23ba3a16b68d14a60d6 SHA-256: 392498ba97e3776fc4187ed3170c9ca6af1b0e3e7c1ac8fc1a35dc356f76f7eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/431946152/how-to-get-1-million-robux-for-free-2021-game-hack PDF link annotation
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/www-robux-us_GM431946152.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://elearning.man1indramayu.sch.id/__statics/gudangsoal/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E69 26888 bytes
SHA-256: b603bb195ca1f2fb9f6610c737c76b0bae33e0b611a2663f4e2e229d9a86c8bd
font_01_sfnt_off00008ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off00009685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9685 19072 bytes
SHA-256: 6899649986c08cd88da4e8ab8a55ee52e34bf21c69bba097983649bb28a6798f

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