Malicious PDF — malware analysis report

Static analysis result for SHA-256 c326aa8d4a18be1d…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 03:22:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 86893eaabb963c9a019bad58c14b2d7d SHA-1: a9affc85fa7d9a45ec6b4bfacaa40b6d981ff278 SHA-256: c326aa8d4a18be1d24892f7f8a3a2296489bf1be48b54a475bb4900fe78eba6b
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.co/app/431946152/roblox-free-robux-quick-survey-game-hack PDF link annotation
    • https://aits.co.id/ckfinder/userfiles/files/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/easy-robux_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-hell-on-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-robux-easy-with-a-hack_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-blox-no-hero-academia-how-to-get-free-spins_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/microsoft-free-robux_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_off000030ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AB 22048 bytes
SHA-256: ed97d7dbd1d403149602d25ef3055cf8df9e2fec7ebb5df3eff69c7c9a7fd72c
font_01_sfnt_off00006166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6166 19344 bytes
SHA-256: 78df02dee22d3c924364b97881766f2d0f1905b0ebd1218fa53712dd5fd60862

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