Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4c14774a1d474d…

MALICIOUS

PDF

44.5 KB Created: 2021-06-10 21:28:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5a7df49076bb2666b4b303fb41b0bc6 SHA-1: 91756c50ad8ebf6dcb1e1c8f98cf3fc7fe4edafe SHA-256: 6c4c14774a1d474dcc470e51c072518b3c2b8391e60661f7bd9150b3674c5a0e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free Robux and game hacks. The primary link, https://netcdn.tw/app/431946152/free-robux-codes-generator-no-verification-game-hack, is flagged as a redirector to potentially malicious content. The document body, though partially corrupted, also contains embedded URLs pointing to similar scam-related PDFs hosted on rushxpress.de, suggesting a coordinated effort to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-codes-generator-no-verification-game-hack In PDF document text
    • http://rushxpress.de/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/roblox-hack-top-model_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/how-to-get-a-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://rushxpress.de/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/roblox-harry-potter-games-free_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rushxpress.de/images/mcpe-master-hack-unlimited-coins-download_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_004_off00004e3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E3A 25584 bytes
SHA-256: a26c9dad3f7c3b739638102ede07c1bef0f721a26f93b3688bc7503cb539eef6
font_01_sfnt_off000089c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C3 18776 bytes
SHA-256: a4a7f46a8ec4e4fe0089faa119d4be48f59112184e2c655defb35f5102acccee

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