Malicious PDF — malware analysis report

Static analysis result for SHA-256 15af955d073d01dc…

MALICIOUS

PDF

45.6 KB Created: 2021-06-10 14:55:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 249dd1f0dbb3e6ba24de54b12703c692 SHA-1: 51113f963a455bd1a8010c055527754f350d147a SHA-256: 15af955d073d01dc87c7bb5bd0a0517234f3521b2941fcf174a041e4e2f5a883
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 0.9864

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.tw/app/431946152/how-to-get-100-robux-on-roblox-free-2021-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-lmao_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-use-speed-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-girl-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/youtube-roblox-dax-she-cheated-roblox-code_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_004_off00005280.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5280 25860 bytes
SHA-256: d76a4a5124b6e454abd3942123dd7eb80d85d3228429289d0fdbff60f846de41
font_01_sfnt_off00008df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF1 18756 bytes
SHA-256: 7ebd1a648f0cfc4e4c1bf6a589378a63004d616a28f97b96437788392a7c0079

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