Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af76ca59d5dcca7…

MALICIOUS

PDF

34.4 KB Created: 2021-06-19 21:07:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 77ff7449bfc4330875d53b5aec5f1c8f SHA-1: dd06b3a572a73efe98646def419581c944364b17 SHA-256: 9af76ca59d5dcca718d632e52e854b4a63792b5bddba4f5e232f863e8e45807e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. 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 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.co/app/431946152/2021-roblox-got-hacked-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/cheats-for-roblox-for-money_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-cheats-to-get-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-on-roblox-on-tablet_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/luis-coment-robux-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/near-tiktok-free-view_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/get-free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-dragon-ball-rage-stats-hack-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/cmd-robux-hack-real-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mtsn-barantIn macro / runtime command snippet
    • 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_off00002fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAD 21984 bytes
SHA-256: cc3187f635369ae84466b432cc8cd97f35a54bf8ede07453cb3008eb9b50c802
font_01_sfnt_off0000603c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603C 19336 bytes
SHA-256: 9dee9e764129379412a6575abf009ae059c78e7a94fd2f474af272fc6bb78482

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