Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e42b34f947c69d…

MALICIOUS

PDF

42.0 KB Created: 2021-05-19 19:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dcb6b717490d75cf8156e828ad693c96 SHA-1: 85c2294d8892f8a9cc16827e7758477e912f5180 SHA-256: 40e42b34f947c69dfb94bbf5136e338387c2be5a2dd828bd5284e966a7709d51
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure related to game hacks and free spins, specifically mentioning 'Coin Master'. It includes a critical heuristic firing for 'Recovery secret / private key request', indicating it may attempt to trick users into revealing sensitive information. The document also contains multiple embedded URLs that lead to similar game-related lures, suggesting a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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 https://netcdn.xyz/app/406889139/free-spin-link-for-coin-master-game-game-hack PDF link annotation
    • http://seminolechapter.com/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://seminolechapter.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://seminolechapter.com/images/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://seminolechapter.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://seminolechapter.com/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://seminolechapter.com/images/coin-master-free-in-app-purchases-jailbreak_GM406889139.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_off00004b31.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B31 24004 bytes
SHA-256: d27908029c0c069916f4da854976c309ccd954621645cbd4bed09a37ff53e4f3
font_01_sfnt_off000081e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 18316 bytes
SHA-256: 4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2

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