Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb64b86237a6b7e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 02:21:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3cea5f5284807aa022e956c64db76b4f SHA-1: fda0d496ace70e30f4e02937c5408f00a42fec91 SHA-256: bbb64b86237a6b7eea2dcffb58e4e9fbd1a6f7efcf3a12e341206fdf48423ce5
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.tw/app/406889139/coin-master-computer-hack-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/comment-hacke-roblox-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-without-human-verification-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hacks-extensions_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/gainbux-gain-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/wallbanck-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-hack-mad-city-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-decal-id-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-too-hack-in-murder-mystery-2-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-om-nom-simulator-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-para-tener-dinero-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-robux-hack-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/jailbreak-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-fly-hack_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_002_off00002f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8A 22764 bytes
SHA-256: 958e970d2f7949e78e5bfb6b828026ca3e9fb464a8a86162e6bff6ffd4c9c69d
font_01_sfnt_off00006255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6255 18580 bytes
SHA-256: 497b785ebba59e7ca707536904f047f4e5286b620765a069de1dcc264aa1dd4d

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