Malicious PDF — malware analysis report

Static analysis result for SHA-256 f312a63c923e643b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 23:40:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c9bcee5fe175fe9c191133fefe3f59af SHA-1: c804cc2f81a0986ba38d18c82d3210eeb9840722 SHA-256: f312a63c923e643b201ae289f26251fcaf3f253dbd89f344fd38d481744a2cd9
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/431946152/roblox-script-hacks-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-redeem-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/do-surveys-for-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-cuentas-gratis-en-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.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_off0000307c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x307C 22868 bytes
SHA-256: e62b3cb93c91bc60cfdce0f14cf9d6b2106291073ee49d9c1fb4c2570f6dd512
font_01_sfnt_off00006407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6407 19056 bytes
SHA-256: d579aac1d1158a15ad46381a3b3d03b5c9b37299ce5790291e99ad749e5be703

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