Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d02412fbb0e1d0…

MALICIOUS

PDF

46.3 KB Created: 2021-06-10 21:34:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2486211b5a71d38f4f075ccc79fed0a1 SHA-1: 5a8537241c2345c89edc26934416a8dbcf6c6af6 SHA-256: c8d02412fbb0e1d005a7eda5d4dcd256c9d4b3dc3c06ffea6204106202b1b0b8
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The primary link directs to 'https://netcdn.tw/app/431946152/how-do-you-get-robux-for-free-roblox-youtube-game-hack', which is flagged as malicious infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-do-you-get-robux-for-free-roblox-youtube-game-hack In PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-20210_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/como-hackear-roblox-y-conseguir-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-any-gamepass-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/spam-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-gg-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-packages-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-working-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheats-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-download-no-survey-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/ninja-legends-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/robux-hack-infinite-robux_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_004_off000055ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55AB 26104 bytes
SHA-256: a6d1c15debee393577019b074d7ce7e708413a641a496119a632a44e9fca9250
font_01_sfnt_off00009133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9133 18688 bytes
SHA-256: 51afdea34fb49649b4f39cac27a3102f7e2cc251c136fb736dd5eff69f6822da

Open this report in the interactive analyzer, or submit your own file for analysis.