Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05093fbd85e0f45…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 10:40:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 97a65238f32d01ce4668df542f869190 SHA-1: 0c9bad4bb38d61204381e906285ccb6398431f90 SHA-256: a05093fbd85e0f4539883b625d802fc5293c808f5a757ea27442dca83e471c99
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/free-robux-game-hack PDF link annotation
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-use-cheat-engine-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-roblox-cards-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/cheat-code-bubble-gum-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/roblox-virtual-cheat_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/moon-active-games_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/tiktok-free-tv-shows_GM835599320.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/roblox-download-for-free-zombie-games_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/roblox-girl-avatar_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
font_00_sfnt_off00002f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F10 22320 bytes
SHA-256: 737bcc5b8a0ff213aa0fd5857917a13517ec8254ce3f1612f703e83fc9a36f3d
font_01_sfnt_off000060dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 18716 bytes
SHA-256: ae86725dd70d168e8b5a24377d7effb3bd88f81667aa3e091abc0f5759eb354b

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