Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84a6ba2aae687de…

MALICIOUS

PDF

45.4 KB Created: 2021-05-15 12:36:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f75c31d8c83c9de4d2ac1e104f84307d SHA-1: f573156bfd412668998240d80ce83a906edc6025 SHA-256: a84a6ba2aae687dec985f5cf85c8eb886d3d2fbe031b94913e3dad1c50934e50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising free game hacks and generators. The document body, though heavily obfuscated, contains references to these lures and embedded URLs. The primary function appears to be redirecting users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9417

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.xyz/app/431946152/rbx-free-game-hack In PDF document text
    • http://glll.de/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://glll.de/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://glll.de/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://glll.de/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://glll.de/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://glll.de/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://glll.de/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/robux-giver_GM431946152.pdfIn PDF document text
    • http://glll.de/images/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://glll.de/images/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://glll.de/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/aimbot-download-roblox_GM431946152.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_003_off0000484c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484C 27416 bytes
SHA-256: d48c352c76b641ba05b5a9a11401bd52e7967dd6b52877d37331e1557df96bb4
font_01_sfnt_off000086e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000090ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CE 17732 bytes
SHA-256: 212f4f57de6c922282aa54d2f6f49c5eca850be9602afd8932fff094b4d72406

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