Malicious PDF — malware analysis report

Static analysis result for SHA-256 416595833b0f3055…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 02:39:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7427f95ee805b2d768baa3c67844430 SHA-1: dd875ad1244897348398a89c965c0694969854f5 SHA-256: 416595833b0f3055e32dc4c5d0a149905ab2473a0565205e9a68dbb4e6a9ab42
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'game hack' or 'free generator'. The primary link, 'https://netcdn.xyz/app/431946152/rbx-com-game-hack', is flagged as malicious and part of a redirector infrastructure. The document body, though heavily obfuscated, contains references to similar URLs and the authoring application 'wkhtmltopdf', suggesting it was generated programmatically to host these malicious links. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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/431946152/rbx-com-game-hack In PDF document text
    • http://radoszyna.pl/images/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://radoszyna.pl/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/make-robux_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://radoszyna.pl/images/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://radoszyna.pl/images/rbl-gg-free-robux_GM431946152.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_off00004743.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4743 25736 bytes
SHA-256: 35072c127535f6724267911dc4c1c319754ade8a574a254085b9ac875dd5574e
font_01_sfnt_off000083bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BC 17972 bytes
SHA-256: dffe5730268319e8d6523eb3a7b4d2737e6b1bc7523d2c18f722e59dff9dcb58

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