Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad1a1b87c537cb9…

MALICIOUS

PDF

54.4 KB Created: 2021-06-08 22:23:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b4a3168f4ddefb7e77263f2cae79daa1 SHA-1: 9c5cbd384619cb1c0983bc377c9867ed67f8ae5d SHA-256: 7ad1a1b87c537cb9547992c13ed8aa40ec597a45edefd99a077c1ea3ce8dcece
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 0.9491

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-cheat-and-get-golden-apple-hamster-simulator-roblox-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/where-tiktok-free-download_GM835599320.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/pubg-uc-price-in-bd_GM1330123889.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000533d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533D 29072 bytes
SHA-256: ae0e84578417ea47ef05b518b9971509b80f7e656e2438dc09c76474412f6a49
font_01_sfnt_off0000962a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x962A 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off0000a1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000aecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECB 19316 bytes
SHA-256: 6e6a2a536c2656174acc8088bb09835899c24a37cc0b39747556971e9baff182

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