Malicious PDF — malware analysis report

Static analysis result for SHA-256 461f5d253015e9aa…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 22:39:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 12d64e989196a54ec8bff4edfe1a5332 SHA-1: 1538ef2e67899fd88036dcef68f6329baa048851 SHA-256: 461f5d253015e9aa43f13d61c3d302d63f9dd87f90cfce4569acd75af022399e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a website offering 'free coins' and 'game hacks', a common lure for malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/free-coins-coin-master-link-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pubg-uc-center_GM1330123889.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-download-no-sign-up_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spins-from-coin-master_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_004_off0000518a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518A 25660 bytes
SHA-256: f4dd5b5df2cea6f91eaad22de90a23fde6f692226a261a74f1623752302a64ae
font_01_sfnt_off00008d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2B 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000096dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96DD 17880 bytes
SHA-256: 1662a5b383d9ad60b7b9cee618f90cf0031b74e1c8940e2d562def689eb52552

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