Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c58cecfb7878c85…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 13:35:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 85b5c51378d2ab89be2c4d254c84ce8a SHA-1: d2d08aa97b46f0ba85fdb2ee70a29a2f7cf83c9b SHA-256: 3c58cecfb7878c85441e603754e078f30e49b3808d26cc11924698921caa0737
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/free-robux-games-that-work-sepember-2021-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/roblox-hackeado_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/comment-avoir-des-robux-sur-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pubg-uc-kodu-yazma_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/alone-battle-roytale-roblox-hacks-script-copy-aimbot-esp_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-coins-on-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/woman-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacked-assassain-game-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/como-hackear-roblox-para-tener-robux-gratis-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-apk_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_002_off00002e54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E54 22104 bytes
SHA-256: 4468ef3914213b4d7fb5a6ecc5c0b3bb39a6c31ef74e88ac9104a24f7299887c
font_01_sfnt_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 20192 bytes
SHA-256: 561fd3e4d004a1d7ac39066fc81751f00ddaa7d740da63fd6baccf0274c66b03

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