Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb076312cba85bd4…

MALICIOUS

PDF

53.2 KB Created: 2021-06-09 15:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 22fcfcfe2115aa05ba5819d823f2c225 SHA-1: 4d53e1b92b83b8222f2e004f3ed45f4e3d1f72e3 SHA-256: eb076312cba85bd4310d9099fd06a3bfb9f267fcaa3c0de53e2047859d000523
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The primary link redirects to 'https://netcdn.tw/app/431946152/app-cheats-online-roblox-game-hack', which is flagged as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

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.tw/app/431946152/app-cheats-online-roblox-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F4 28476 bytes
SHA-256: 6eee16744b216f6994c59db202d3c18d7ee4f639f8d23e02649d90d65bf23cd3
font_01_sfnt_off000092b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B1 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F53 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000ac64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC64 18576 bytes
SHA-256: 50ec8439433c9c374c538c47ba9eabc6e86ed0bc9b14536e2dbecfaaa2ae6359

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