Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df1b6bb10e9c337…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 14:03:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 71fb7336dfe6fd569c0e80b00a8cc9a2 SHA-1: 2c058e3da3843dc100b13765d149d37e177ea9e4 SHA-256: 1df1b6bb10e9c337dfe9daff536f92691af8fcf7da88dd0e596ae28a18567c8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary lure is a link to 'free-robux-just-click-game-hack' on netcdn.xyz, which is flagged as a malicious redirector. The document body and embedded URLs reinforce this theme, aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-just-click-game-hack In PDF document text
    • https://kinderdam.nl/images/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/make-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-come_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-daily-gift-free-spins-and-coins-link_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_off00004a4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4D 25664 bytes
SHA-256: da4dfe65b0781abb6952c15bca19ee23faf99e472aaf298dc9eeab84a73b207b
font_01_sfnt_off00008690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8690 18648 bytes
SHA-256: e1ded540cd05842e87825decc4eb8ad0d20e53c32addf12c669dcda9e984b3fb

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