Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f16a98db225e2fe…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 09:14:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6827213642aa2e9c615eb82e6a261556 SHA-1: 99d0662abed07c84037e30c949629d347742d119 SHA-256: 3f16a98db225e2fecf660b64d616ffac82ac3b56102a94b6ca7d0e9acab7f8ac
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 0.9975

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/431946152/free-robux-stream-game-hack PDF link annotation
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/cheat-code-for-roblox-theme-park_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/www-free-robux-hacker_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-get-free-robux-no-verification-or-offers_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/hotels-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-robux-passtebin_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-shinobi-life-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/best-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/hack-de-robux-2021-mayo_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
font_00_sfnt_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 22332 bytes
SHA-256: 5a25111e692b285c7a47443e3f2b58cf37485bfed5acb66922727caa0afcfc4a
font_01_sfnt_off000061aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 19080 bytes
SHA-256: 1c6afd9c6a74c9760f64a05e730cb8b9fe2917919de1f03b4396640c76df1420

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