Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa4c912f4d699109…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 16:59:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 819a860cfb75c16f415d77400b8bf0ae SHA-1: ad6a61e9191778493e6bdcb851dd0d181c315e9b SHA-256: aa4c912f4d699109eb92d45652984af4d987e7e799e5f75b098076bb79eaa97b
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/who-do-you-get-free-robux-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/games-to-get-me-free-roblox-now_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/paginas-hack-para-conseguir-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/cool-free-tshirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-para-dragon-ball-rage-roblox-pc_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/a-hack-gift-card-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-retro-craftwars-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-free-games-without-download_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/www-bloxland-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-gir-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/tiktok-views-free_GM835599320.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_off00002fc1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC1 22708 bytes
SHA-256: 7630242cebb4e3def0d9e1cab18188d8de0bdf43808cfca75e46f673e913c0ae
font_01_sfnt_off00006214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 19512 bytes
SHA-256: f8cec2355dc33619335dc5ca62dcdecb0b525b8e18cd17da3f4b649114006665

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