Malicious PDF — malware analysis report

Static analysis result for SHA-256 478d7b2c9cb4acbf…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 03:21:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: d1e166653d35d2d0175c312a4bbe6ef5 SHA-1: bc19bdfc93888f71abec528ea73fac2165a4349c SHA-256: 478d7b2c9cb4acbfe91991d272fe1fba2b4a698548fc0bf8384aac597e8952c0
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.online/app/406889139/coin-master-spin-hack-2021-game-hack In PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/can-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E9 26396 bytes
SHA-256: 5f97778134bc7e6247e78b4c45fb3bde9310876fc860019a7915cd1311a1574c
font_01_sfnt_off00008e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9835 18296 bytes
SHA-256: eaa60ab3b9dbdc46d7aef4d77b4227c1d0aeb4180c3635ae77be6ae4ebf58c24