Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8a45dac68bb68e…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 00:59:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a1a5da8df1ba5e89f771916862a80d5 SHA-1: 76e65ae73f7299a76c6e218f5638196f9591969e SHA-256: 5d8a45dac68bb68ece855ab129c3489d4a8b23a7d7e417cac995c92333f10b4f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is designed to trick users into visiting a malicious URL by promising free game currency or hacks. The embedded URL, http://netcdn.tw/app/431946152/how-to-get-robux-easy-game-hack, is flagged as a known malicious redirector. The document's content and heuristics strongly indicate a phishing or social engineering attempt to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-get-robux-easy-game-hack In PDF document text
    • https://library.univthamrinaka.com/repository/groups-that-give-you-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/hacks-for-the-plaza-in-roblox-to-get-money_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/executor-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/project-delta-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/cheat-roblox-2021-la-dernier-misajoure_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/hydra-roblox-game-that-gives-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-face-750k-sales-roblox_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/pubg-uc-or-ag_GM1330123889.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/can-u-get-roblox-on-ps4-for-free_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-robux-with-human-verifaction_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/did-my-roblox-get-hacked_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-hack-roblox-robux-easy_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/robux-hacks-were-you-can-download_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-spins-link-2021_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
font_00_sfnt_off00002f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F35 22612 bytes
SHA-256: f00c82fbddcf96e869ede79c1858c59757fcb92465af1b518bdd50f0769cb83f
font_01_sfnt_off000061f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F8 19000 bytes
SHA-256: 9c8ff038a449ab176a5e1d1aada010ae8dcfba4f01e2557d9a848b5c6737e1f5

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