Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd764632e472a336…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 13:21:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bdef57789acb0320219eabea1875f72c SHA-1: a717dd3396a2dc53ac4209d0d0ca88a3f02997b8 SHA-256: bd764632e472a3369e0558fdad21a43fe820f27a1121caa1bae8bc04ac3e177d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, disguised as game hacks or free Robux generators. The document body and heuristics indicate a lure designed to trick users into clicking these links, which likely serve as a first stage for downloading further malicious content or redirecting to phishing sites. No scripts were extracted from this sample.

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/406889139/how-to-get-to-village-3-in-coin-master-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-get-free-robux-on-tablet_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-someones-account-on-roblox-july-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-codes-live-stream_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-hack-november-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cbro-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-games-that-has-roblox-in-it_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-roba-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-engine-double-jump-roblox-mac_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-40-robux-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-admin-on-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-roblox-players_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_002_off00002f95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F95 23352 bytes
SHA-256: 510ee7927ce98fdc83f65d73b7b50b8a55ce9013ecc1df4659f8f0aac1ba0c27
font_01_sfnt_off0000645f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645F 18380 bytes
SHA-256: 719c44d621eea83d2118d585285fa0da07fb34d8e905b2248b9284b96b456eb4

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