Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d61ffac8e8901e…

MALICIOUS

PDF

33.3 KB Created: 2021-06-27 03:42:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5fff347436d2400c9fbc4d4036e12623 SHA-1: 121575758c1af89630496987ad00e88be6102e10 SHA-256: 84d61ffac8e8901efca03e464ae8afa23cab383f0aed9a88543309c8db229b65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game currency and hacks. The primary link directs to 'http://netcdn.co/app/431946152/roblox-hack-free-robux-and-tix-no-survey-game-hack', which is associated with game hack lures. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-hack-free-robux-and-tix-no-survey-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-stricid-codes_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/trurkey-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-roblox-hair-codes_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_off00002a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A17 22356 bytes
SHA-256: dc85061f35a124d888a2c475584b6ff6eb02bd2728c4ed61750f83dabb51b245
font_01_sfnt_off00005bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF9 19548 bytes
SHA-256: bac52c9bf7e4cdc011ec3416b6edb6c9feeaa784d4de570f90752064b14ae866

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