Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5501481616d36c…

MALICIOUS

PDF

43.9 KB Created: 2021-06-13 23:48:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a44266dffe35ff3439c6df9d806a2302 SHA-1: a9c697f716b43765230deadbf250272d05686e2e SHA-256: da5501481616d36c242a98ee56f0dd7459a628568494a244441fe8ebb38acc2c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to trick users into clicking a link. 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 social engineering tactic by repeating the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-no-human-verification-or-survey-or-download-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-codes-2021-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/red-boy-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-link-spin_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
stream_003_off00004cb7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB7 24648 bytes
SHA-256: e267d6ff4af5d30408e746e34982fae05c1867321d39d12773c8ab35e2d23e1d
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 19736 bytes
SHA-256: 59e4374f8172b973ba9217c83b5ce6b26483f5ae1ceeffd331798f57e1658bad

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