Malicious PDF — malware analysis report

Static analysis result for SHA-256 df986caf9c635563…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 12:00:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cde5c5b63d6f4b93db433e2d0d64501b SHA-1: 40256c1f95933d034145773595ec55f146ad4d53 SHA-256: df986caf9c635563e6fc2f41a06e0fd000f9ad6b7e71cb6d4e5acb9322954fa6
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 0.9865

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/479516143/minecraft-apk-android-free-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/robux-best_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/pubg-uc-dundle_GM1330123889.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-apk_GM431946152.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_off00005114.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5114 24700 bytes
SHA-256: cbd0dd331d0ca526f6f49215b94561bf427a97cd03cb8023d43deb164c780fe2
font_01_sfnt_off00008886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 18228 bytes
SHA-256: 3180bee3546e15234fed753f25771b93e4d3b2f7dcb5c3070751dc9d02e0c18a

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