Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ac15c4952f7a3c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-15 14:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 580fa2413e7c740a55cd3af2e93f137e SHA-1: d57e8180b2352e78430dd13c1639c25d8abd8354 SHA-256: f6ac15c4952f7a3c73e891b3f3f85ae64308e9501e4d0b3bf5d5f41c3d0c7ef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/daily-free-spin-coin-master-link-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to potentially harmful content or initiate downloads.

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/daily-free-spin-coin-master-link-game-hack In PDF document text
    • http://klinkeridee.de/images/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://klinkeridee.de/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://klinkeridee.de/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://klinkeridee.de/images/coin-master-free-spins-hack-no-human-verification_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_off00004801.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4801 23384 bytes
SHA-256: 445480a8094dc93c6c07839c12b6988404e9bf8dd96115817d376e17b06b09e2
font_01_sfnt_off00007cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFD 18476 bytes
SHA-256: 13087f23ced5a654764a402ace47e06b7ceeb886891228a443e0cb07dd9c4176

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