Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f2046ed4d3cbab…

MALICIOUS

PDF

44.0 KB Created: 2021-06-10 22:13:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 84e30535bae5bd9dab7edc922c771930 SHA-1: d1ff65ce4e2b25e7db061addcd894506a72b1d07 SHA-256: f9f2046ed4d3cbab96d3b325e78a5f0bd8563f1aedd6153d2a0b11ac053390ad
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 0.9865

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/super-hros-roblox-free-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/pubg-uc-myanmar_GM1330123889.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/mosttechs-coin-master-free-spins_GM406889139.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_off00005069.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5069 24448 bytes
SHA-256: ad8939fdf96e10067190fe570c47c82b4f90ae4ac37b3f3492c0f6274e6cebd5
font_01_sfnt_off000088f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F0 18464 bytes
SHA-256: da93baefdab6069120319740687669c3201fd7b5c28cb556208ccfd9741c75dc

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