Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f009f9dfa80f00…

MALICIOUS

PDF

41.5 KB Created: 2021-05-19 22:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 84050c7c7ea52877c447a1a3689b079a SHA-1: f89201a67a61019b4ccc89445709a8ee7e795522 SHA-256: f5f009f9dfa80f00e1af4cbce9c5d28b22b8bb6bd6d5fc98e82f5f4935e7c435
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. 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 0.9971

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/406889139/free-daily-spin-coin-master-game-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/tiktok-free-840-apk_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/daily-spin_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-accounts-on-phone_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_003_off00004888.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4888 24044 bytes
SHA-256: 8a285c7d45769fa190d7f2a9ab7f5a8fcc59a21cd674c345f285fa5f02dcf6a6
font_01_sfnt_off00007f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2E 18568 bytes
SHA-256: bfd1e8101d459247551dcdbdaef1be92b80677b1afc3c882b62bac5b198db3f9

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