Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03856751171cab3…

MALICIOUS

PDF

41.2 KB Created: 2021-05-13 14:24:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 49ba59d2a5b1231b2ea9c243239ee50f SHA-1: 968a2f09edbec687d846ace1c1747db63efaf036 SHA-256: c03856751171cab30545a277714eb9d1e0d488e16723e7ca28b079ddec219327
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and external websites, disguised as 'game hacks' and 'free generators' for popular games like Coin Master and Roblox. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-connection-lost-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a phishing or scam attempt to lure users into clicking malicious links, likely leading to further malware downloads or credential harvesting.

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-connection-lost-game-hack In PDF document text
    • http://mostowicz.pl/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/free-robux-today_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://mostowicz.pl/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://mostowicz.pl/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://mostowicz.pl/images/coin-master-daily-bonus_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_off00004723.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4723 24856 bytes
SHA-256: 0fad70ef54cb6c8f9b27407c891c25ceba32b74b9788139609b02b6337389dfa
font_01_sfnt_off000080a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A0 17544 bytes
SHA-256: 9f47ca29f5d3cba5ee5b5d247315bf4a819aa5821b514d9805702da8eea6d0f3