Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1df0730f26bae8d…

MALICIOUS

PDF

41.9 KB Created: 2021-05-15 00:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4b8c0fed0abbe77c730f7b12af64c564 SHA-1: 2cfaba55af9a24bd742bb02f9abf8eae8fab716c SHA-256: d1df0730f26bae8d5e828251a43b369aae404ef868e9e2be4a7ba9a12b1740bf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising 'Coin Master' hacks and free generators. The primary malicious link identified is https://netcdn.xyz/app/406889139/coin-master-ios-gods-hack-game-hack, which is flagged as a known malicious redirector. The document body, though partially corrupted, contains similar themes and URLs, reinforcing the lure-based attack pattern. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of this document being used for malicious redirection or further payload delivery.

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-ios-gods-hack-game-hack In PDF document text
    • http://uptodate.az/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://uptodate.az/images/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://uptodate.az/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://uptodate.az/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://uptodate.az/images/free-coins-coin-master-blog_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_off0000491c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491C 25576 bytes
SHA-256: 6b271c957f5c05019aad6b94739adbf21ed411a0170c4c87370c508766ba0ab0
font_01_sfnt_off00008283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8283 17888 bytes
SHA-256: d8eea4be3fc99e1ecb7ba73b2b91be59596119d2ac4c670f115fb590b846a8a2

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