Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fae381ef3037597…

MALICIOUS

PDF

44.8 KB Created: 2021-06-13 19:26:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bc10f4246dc31e3cb13a22657f745d5 SHA-1: 290a6a249d9c03e71868913cad1e2501707509d9 SHA-256: 8fae381ef30375972ba950630fc7a324724b3b84427e53a02823a3d39a783da4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body, though partially obfuscated, contains text related to 'free unlimited Robux' and a URL that aligns with the heuristic findings. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

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/how-to-get-free-unlimited-robux-indigojoe-game-hack In PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-giveaway-discord_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/pokemon-go-free-yveltal_GM1094591345.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-bugatti-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/secret-robux-hack-subscriber_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/hack-roblox-troll-gui_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/what-games-work-with-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/como-volar-en-roblox-sin-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/roblox-legends-of-speed-race-cheats_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-change_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b1e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B1E 26436 bytes
SHA-256: 188ceaf9ffac4056163e63ce7901fe9e284cdcdfbda625e39d3249f3b8a1f03d
font_01_sfnt_off00008918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8918 19572 bytes
SHA-256: 1705d4f843cccbd91ccefb70559fc5bf8f32b97ac675d9403a60438cfb6e767a

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