Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50cccdd51108f8b…

MALICIOUS

PDF

44.3 KB Created: 2021-05-13 17:15:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f28951a6fe358cc1187f5e320b9791e3 SHA-1: 08f96c4b85d562cac94d98e58b8ee3ba2e584f94 SHA-256: f50cccdd51108f8b4d6225cc9ad7acefb2c65f67749d6ba25705e222c4c19609
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 0.9648

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/406889139/hack-game-plus-com-coin-master-game-hack PDF link annotation
    • http://digilib-pps.unja.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib-pps.unja.ac.id/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486B 24884 bytes
SHA-256: 76e500e06ec324f74f11205d5af777a3f0878cac61705233f64645d940641a66
font_01_sfnt_off000080a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A6 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00008a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8B 18344 bytes
SHA-256: 67e0faa45ea1c1ed6f200b64ded63a8801cb37d584db731deacfac1a4f2a4512

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