Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6119004271ef5b…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 03:12:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ac6294d8df47c22d704a3eaf371cf6f4 SHA-1: 074f1a34ac18c888707fba20179507557423a99d SHA-256: bd6119004271ef5b4665b442688f4054e9c8d68b4c3c51fc70f8b58fa1a6a640
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'game hack' redirector, specifically pointing to a URL related to 'free coin master spin and coin link game hack'. The document body, though heavily corrupted, contains similar text and the malicious URL. This suggests the document's primary purpose is to trick users into visiting a potentially malicious site, likely for phishing or malware distribution.

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/free-coin-master-spin-and-coin-link-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-rewards-robux_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_off0000509d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509D 24948 bytes
SHA-256: 77aa0fce98e1bb7563a58da0e92ebd8bd1fa9f7fc2a08792867878ce6159bcad
font_01_sfnt_off00008971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8971 18228 bytes
SHA-256: 033fb27de386422edfdfffc04f89508c7363de2f22c7244a0850c98a16a8d6aa

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