Malicious PDF — malware analysis report

Static analysis result for SHA-256 3433bd76e59c4b9f…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 16:55:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 910307726ca8b6060c89a33d81e29980 SHA-1: d1ba88a6aa97368143c7f1b9956dad127e2d4e0b SHA-256: 3433bd76e59c4b9f6cea85d9f37476782c05a3e1d122982c42de9b5918e07ac2
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 0.9980

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 http://netcdn.co/app/431946152/i-want-robux-for-free-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-gg-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-games-with-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/pastebin-robux-account-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/do-you-want-free-robux-get-unlimited-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-codes-adopt-me_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-noclip-exploit-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/cheat-codes-for-roblox-free-robux-pc_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/como-tener-robux-gratis-sin-hacks_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hacked-version_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
font_00_sfnt_off00002f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F76 22340 bytes
SHA-256: f3345bfb4a2b1dfb5778ab96cdfa5be7fb6d93c85a971ce48bceecda5e34bc9c
font_01_sfnt_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 19020 bytes
SHA-256: 54605eb8873c191e2f2f377040ac3064d44872f90a8acfc68eb680f56508c57d

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