Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d8027e8fc7e36ff…

MALICIOUS

PDF

49.2 KB Created: 2021-06-07 19:30:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 90fa869a3387f1b642bb14a5435cc994 SHA-1: dbed9338ffe00316c9c29b48962244611aafbf7e SHA-256: 2d8027e8fc7e36ff9b80d8a0c1bd023288f9374868987830dde7b7df096b2958
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure directs users to 'https://netcdn.tw/app/431946152/how-to-hack-roblox-for-robux-on-computer-game-hack', which likely serves as a gateway to further malicious content or downloads. The presence of multiple similar links suggests a campaign focused on tricking users into downloading unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-hack-roblox-for-robux-on-computer-game-hack In PDF document text
    • http://guimaq.com.br/images/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://guimaq.com.br/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-free-robux-no-waiting-now_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/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_004_off00005021.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5021 28844 bytes
SHA-256: 55f118ca8b308ad29afdde9ce5442ec9b12b9c91fa6a148a939a5f97bbce450d
font_01_sfnt_off00009109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9109 2888 bytes
SHA-256: dcdd98ee8e25436a83587ccb4027347dd2c3fcec95f3413942edd4086125bcca
font_02_sfnt_off00009add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADD 19192 bytes
SHA-256: c7e84e1b183748f07439cf94d574c4bade0331c4fcaa3f6ee2f08e33f82bb074

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