Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26ff7f016125a90…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 02:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e10bbb99959a97d125bf8444dea61c7a SHA-1: 5bc37cd7ff2a03551bba1813899a743110581df8 SHA-256: d26ff7f016125a90c2f39bd4e5b9476c29da677520adec0ffaffb7f755e43914
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a lure for a "Robux generator" or "game hack", indicating a phishing or scam attempt. The primary URL, http://netcdn.tw/app/431946152/robux-no-human-verification-game-hack, is likely part of a malicious redirect chain. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/robux-no-human-verification-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-make-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/cheat-codes-for-superhero-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hack-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-games-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-faces-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-website_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-one-piece-millenium-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-weapons_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hack-all-game-gun_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-future-hack-scripts_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/cheats-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hack-of-getting-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hacked-roblox-face-id_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-games-for-free-for-you-to-play_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-jailbreak-speed-hack-new-code_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3184 22416 bytes
SHA-256: 6759a4d7e4fce46370b0de824363e6ab7cb5c367e7ed5cedf2f80fa3b15fd4ee
font_01_sfnt_off0000636d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636D 19168 bytes
SHA-256: f84039c9361d4f9d97108524e2d84d99e94a3822b4246e645743a6f7b891171e

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