Malicious PDF — malware analysis report

Static analysis result for SHA-256 479147f3fd3a73d0…

MALICIOUS

PDF

35.3 KB Created: 2021-07-08 17:22:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f90a1adeacef129f2b99f905fa78a98e SHA-1: a3add11d94fe3e4cff13a326593f99efa77bd1a5 SHA-256: 479147f3fd3a73d0f7d3a1de0c018c89de047741d5277fb8f100abb14d858686
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/blogger-coin-master-free-spins-game-hack In PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-hack-gravity-on-roblox-with-nopde_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/free-roblox-account-getter_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-look-like-a-pro-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/banning-hack-roblox-working-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/how-to-get-tiktok-free-likes_GM835599320.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/robux-generator_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/roblox-hack-download-android-2021_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/troll-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary//repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://akbidprimahusada.ac.id/elibrary/repository/nnuevo-hack-de-robux-20210_GM431946152.pdfIn PDF document text
    • http://akbidprimahusada.ac.id/elibrary/repository/robux-hack-no-verification_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_off00003358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3358 23028 bytes
SHA-256: 6d9b8ed1ec2dfe1f4b7efadeca32b6b902b7a24297554d475fb5ad6de08acf3f
font_01_sfnt_off00006719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 18464 bytes
SHA-256: f296297f24d16be59dfb68755b8dea07f16f55f25f89e3d3dbe8c2451ee9dbcd

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