Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b322f827b856424…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 02:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: abee78736b4f3d9a95bd5fa8e9437e0e SHA-1: 60601b870704aca9a40a14332473ac93925236fa SHA-256: 6b322f827b8564245f58b4f6ee68ace7ced9458b24c2189706aec2bedef62c9c
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/how-to-get-free-coins-on-coin-master-hack-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-roblox-2021-june_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-freebies-robux-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/cheat-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/tiktok-free-download-for-windows-10_GM835599320.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/most-hacked-roblox-games_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-roblox-locked-accounts-with-obc-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_off000030ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30AB 22564 bytes
SHA-256: 66fda69299dae587bd6536f7674b4aaf7476d1fd12f87e2c408ba8b07e920a9f
font_01_sfnt_off0000631f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631F 18332 bytes
SHA-256: 5b878530e69a12175dbf01b0ca128da18827fe0c1663de911774679428d069c4

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