Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6b76a8d68ade0f…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 06:38:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e53f309f2bd61337d6ef59e492cabfbe SHA-1: 7fba4deaf44276ba181a5ab3d9fadc22b38ea60d SHA-256: ef6b76a8d68ade0f144b36079d874c3b6dc4af34f2b0b21f82bb664d541f941e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically promoting 'Coin Master' and 'Roblox' hacks and free spins. The document body and heuristics indicate a lure designed to trick users into clicking these links, which likely lead to further malicious content or downloads. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/coin-master-free-spins-and-coins-hack-game-hack In PDF document text
    • https://schulzpressetext.de/images/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/roblox-tracker_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/corn-master_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://schulzpressetext.de/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • https://schulzpressetext.de/images/earn-free-robux-for-roblox_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_off00004939.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4939 24264 bytes
SHA-256: 4320a89fca9374ba2c0f9f66c6eb9d700e4f31b6d2170c8aa1f761d0db1dcb17
font_01_sfnt_off0000800a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800A 18228 bytes
SHA-256: 968d77e43c6b0b1c299d9da4b9fdaa5840c103d7fe58a67c77b67690964fdfdc

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