Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb65b8359e7c6b45…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 08:33:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 20347993c58095faf807a6eb12345073 SHA-1: d8c5a7faa41e05ef90d3cb7c3bb274e8f4450500 SHA-256: cb65b8359e7c6b45abdc1581603df2543aa7bb06ca7d18d4c32c90b05fa1471c
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 0.9980

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/406889139/coin-master-free-spins-game-hack PDF link annotation
    • https://mtsnberau.com/__statics/gudangsoal/files/roblox-bloxburg-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/how-to-hack-roblox-games-2021_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/btools-hacks-roblox-2021-barbaric-gamer-oficial_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/free-download-roblox-pc-virson_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/hack-menu-roblox_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/how-to-get-any-item-for-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/how-to-get-a-free-invisible-head-in-roblox_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/roblox-insta-arrest-hack-jailbreak-pastebin_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/free-robux-generator-no-download-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/aos-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/can-you-actually-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/roblox-cheats-unknowncheats_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/promo-code-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/roblox-admin-cheat-engine_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/ulgamesresourcescom-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/free-jackets-on-roblox_GM431946152.pdfIn PDF document text
    • https://mtsnberau.com/__statics/gudangsoal/files/free-tiktok-likes-app_GM835599320.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_002_off00003156.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3156 23536 bytes
SHA-256: eaa56c1d61e36b54010ff4d3913ef37c8c0d10ab5888ecaf6906f1ac5af2b44e
font_01_sfnt_off000066be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BE 18176 bytes
SHA-256: c90cd52c690b3b1dd04b69356ad4f8db221968fb130a3d2ff71dcd50323a1a90

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