Malicious PDF — malware analysis report

Static analysis result for SHA-256 989c4616505ea8ee…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 23:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e1736341aaf908a2faec3d11da08cbb2 SHA-1: ca0ed3c814c780015aa096178cc5ec293b4d3a40 SHA-256: 989c4616505ea8ee6ca629740088e64d35ed9763b2422e3266f9d4922605a2d1
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 0.9864

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.online/app/431946152/inject-hack-roblox-for-robux-game-hack PDF link annotation
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-download-roblox-on-xbox-360-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://pustaka.kebudayaan.kemdikbud.go.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A8 24804 bytes
SHA-256: ad98d7de9378304ec1746a4d98648b522429fb51ffa5a4cd1ce7e9d4dd7bc724
font_01_sfnt_off00008cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF5 18780 bytes
SHA-256: 1e72e1e1d78c6a60f00d3b3d256a23cb0dadd32e39494c836b91608530d439af

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