Malicious PDF — malware analysis report

Static analysis result for SHA-256 55105a38bc84a06b…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 01:38:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5b2906a82838ac0a0e7cacea89602119 SHA-1: 83bc46ee1e7d5c135ee82ac32b2c95fa32400318 SHA-256: 55105a38bc84a06b31544ee3473695a5c41f62b6401355b447ecc6420b2fc36f
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 0.9971

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/1330123889/pubg-uc-price-in-nepal-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/near-tiktok-free-view_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-on-computer-free_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_003_off00004863.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4863 26156 bytes
SHA-256: 4694927028d7f573024ff0e6a21648998688600f48eac490a4430859533251a2
font_01_sfnt_off00008344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8344 18496 bytes
SHA-256: 7bc5b99983869a64b6f593bcd255a6f25d6154d142446b842ffc67981ab21f36

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