Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc1fdcf845f0a12…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 12:40:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c9509546b96f6a0e0d2d28682db88e0f SHA-1: 6ba2fbe16c723466dd38099a8cef5a1d0f99b567 SHA-256: 3bc1fdcf845f0a120d21863673f02bb5663ce608f0f90e38273d8732dd24271d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector, which is designed to lure users into clicking on game hack-related content. The primary malicious link directs users to 'https://netcdn.tw/app/431946152/gravity-switch-hack-roblox-2021-game-hack', likely serving as a gateway to further malicious content or malware. The presence of a visual download button further supports the deceptive nature of the document.

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/gravity-switch-hack-roblox-2021-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/spin-coin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-how-to-look-like-a-ghost-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/pokemon-go-free-shop_GM1094591345.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_off0000557e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x557E 25068 bytes
SHA-256: a7f4333e195897c8ecc5e0dc2f9994c67ec7f716922c6aa66e3f3c08c5f526dc
font_01_sfnt_off00008ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC8 19432 bytes
SHA-256: a84d8ddd5f5ce73796a51c5a7ee49e6b5a5dd812e4981fbc141a6c49bdb9b2a1

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