Malicious PDF — malware analysis report

Static analysis result for SHA-256 57115e9335db5c9c…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 07:41:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5df087465a5f4bf2409076b58dc76ea4 SHA-1: dbfdcf1b0a4fe5c2e45d43ab4debbf2d484a6d0b SHA-256: 57115e9335db5c9cf2238c28b1844f7f6c301e1bfeb84d575cc968117f09b4a9
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-cards-hack-2021-game-hack PDF link annotation
    • https://morishita-tc.com.tw/image/data/files/how-can-you-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/rbx-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-emergency-response-liberty-county-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-on-roblox-jail-breaker_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hacks-for-treasure-quest-on-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-make-any-purchase-in-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/tiktok-free-usernames_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-my-gamescom-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-2021-easy-no-human-verification_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-coins-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-jailbreak-cheat-engine-hacks_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/moon-active_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
font_00_sfnt_off0000312d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312D 22940 bytes
SHA-256: 45519306c5839beba155e802f8721d26339643550a24b882e3a0069305795e48
font_01_sfnt_off000064cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 18580 bytes
SHA-256: 47e303c72cd5b62bb17ad4e651525e7015df29692984bfa1ae4c9035b919f2a0

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