Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5b1cf6118691af…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 00:25:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cc85eb519772fdd4b8ef25887c41e304 SHA-1: b993a74a4ac228b7b16b5dd97a6cee9cca8667b0 SHA-256: ec5b1cf6118691af99a48bc1943f1edbb84871aeacda53ae1e07fab458486ebf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple embedded URLs that are disguised as game hacks and generators. The primary URL, https://netcdn.online/app/406889139/coin-master-hack-apk-35-33-game-hack, is presented as a lure to trick users into downloading potentially malicious content or visiting a fraudulent site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-hack-apk-35-33-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/with-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005158.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5158 24756 bytes
SHA-256: 9bc8367361aab14d727cff5c07c9f5d008e9404522d59d8bb6cfea4a16f1ed3f
font_01_sfnt_off00008982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8982 18200 bytes
SHA-256: b2924f0237a3c0938d81e835a835fc5e0f49ca14d8df49d32683e5595cceebf6

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