Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9e8d719da77f07…

MALICIOUS

PDF

40.3 KB Created: 2021-05-14 03:23:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ff506a66d8a65906a560cb0435fa3c4 SHA-1: 11370c0cc0d9fc35b7f91faf68f4569856229c20 SHA-256: 9a9e8d719da77f073831d174bbda6724f9ad22bd383813a4d9cf36a74cc16ea5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are flagged as malicious redirectors, specifically pointing to 'game hack' or 'generator' lures. The document body, though partially obfuscated, contains similar URLs and references to game-related cheats. The primary function appears to be directing users to external, potentially harmful, websites.

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/freespinandcoin-game-hack In PDF document text
    • http://klinkeridee.de/images/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/minecraft-free-apk_GM479516143.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_off000045c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45C8 24084 bytes
SHA-256: 2fc607cee3d03480229673c04f78ab75036994be2d1e4b12be3ff428d05bad25
font_01_sfnt_off00007c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C36 17956 bytes
SHA-256: 1c693cd3c749c7deb88a93ce437f6f23953c7e7e8560ccdde2498ee9463f8dc4

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