Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ba240494b45da0…

MALICIOUS

PDF

36.2 KB Created: 2021-06-27 12:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a903637eed0a64cba4ec9b28cd0ebe91 SHA-1: c53d51cbe317ee9957fbdb87e0a7991f87b59a69 SHA-256: 90ba240494b45da08484c6881b2dafea89deebacb334fac21f54393f62af3623
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body and embedded URLs reinforce this theme, aiming to exploit user interest in obtaining in-game currency or cheats. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.co/app/431946152/roblox-robux-hack-no-survey-no-password-2021-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-can-you-hack-roblox-gamepasses_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-how-to-sell-a-t-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/codes-for-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-black-wings-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-no-verification-2021-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-advanced-placing-in-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-ad_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
font_00_sfnt_off0000331b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x331B 22588 bytes
SHA-256: 00ee82c70fcee0a4618c0dc0c6d23a28e458ab6b04ffd38e50d158496e41362e
font_01_sfnt_off000065a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A3 19984 bytes
SHA-256: 510161933d995e9d4ad51254d240b0e173dbd5a7ad7a93d529b31ea2dd3d8bd1

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