Malicious PDF — malware analysis report

Static analysis result for SHA-256 394df231ff47352c…

MALICIOUS

PDF

46.6 KB Created: 2021-05-14 00:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 331a598c2c6136d1723fcda40256909b SHA-1: 6b59d960f147355fde6d572a483589f4fae35c63 SHA-256: 394df231ff47352cbbe80ead91f4cec5a05bc81462169bb03ecc2cd0177ea190
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with 'game hack' content. The embedded URL `https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-game-hack` is a primary indicator of malicious intent, likely leading to a download of a second-stage payload. The presence of PDF-specific heuristics further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-free-coins-and-spins-game-hack In PDF document text
    • http://gbp-trabkiwielkie.pl/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/roblox-weird_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-robux-net_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://gbp-trabkiwielkie.pl/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DA 25988 bytes
SHA-256: 2af7e95a3c5921fffe37d1371ee44c8c4683631efa97620ead6100fcc04be1fd
font_01_sfnt_off000086d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D8 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00009460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9460 18060 bytes
SHA-256: f77ee24e01944806ea28e16fd73427a54f7109e241804df06ce657d8c6d11cfb

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