Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfe879fa91c8dc9…

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 20:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8fb01f6b4fe70581479e1f75cebb2078 SHA-1: d00f8135203a04e7a40736b45ace1756b39f85e4 SHA-256: bdfe879fa91c8dc9481672bceb8e23ca9d811d245d77d410b667411760a7856a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicated maliciousness, and the document body contains a clear lure for free in-game items, directing users to a suspicious URL. The presence of embedded URLs and a visual download button heuristic further supports a phishing or scam attempt. No scripts were extracted, but the overall pattern suggests a social engineering attack to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/get-free-spins-on-coin-master-game-hack In PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-many-free-spin-links-is-there-for-coin-master_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_003_off000049e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E7 25992 bytes
SHA-256: ef0f562c15e6ce3891af468e8dc5387b8ba0bc73cc384743555db061b61295b5
font_01_sfnt_off00008485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8485 2928 bytes
SHA-256: 64242521e32848fe2434190b0c7414fcd492221a3cc2972c66f57f4842775e11
font_02_sfnt_off00008ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA2 17884 bytes
SHA-256: 200850e3a78b1b50c9881a74b6d24eace04c65468f288c9b2f31b5952499e453

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