Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c66681353c81322…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 22:49:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bdb33361c834432272edbf0f5ff4f038 SHA-1: fab8e70bc295211c63720abb7d43fd8c577e37f3 SHA-256: 1c66681353c813222ba9222913b56b73ac5e00e8d9f483caab0c91b5df1bba17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" and "free generators". The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-reward-link-game-hack. The presence of these links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to lead users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a malicious intent.

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-reward-link-game-hack In PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/robux-get-com_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/roblox-ban_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.lacarla.dk/images/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lacarla.dk/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004804.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4804 27980 bytes
SHA-256: 5adf8816ffe275e566562d87945fe4cb6b05145cc5a5ca0cd4fc805e46917db4
font_01_sfnt_off000085e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85E7 18056 bytes
SHA-256: c2793d17727503817a30064ba8beed92adc1bd6ab198ac538296771cbb61b552

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