Malicious PDF — malware analysis report

Static analysis result for SHA-256 478469fb53a6e176…

MALICIOUS

PDF

48.7 KB Created: 2021-06-07 01:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 1cd1260209dbd1e714015ead99758b24 SHA-1: 95e7463431f0f47c4caf34d13b94f2a15c3fc221 SHA-256: 478469fb53a6e17612c5e62c013b0a45d5f6134750a85585f088d30972a86d11
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.tw/app/431946152/free-robux-promo-code-hack-game-hack In PDF document text
    • https://agoramedia.ro/images/robux-free-c_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://agoramedia.ro/images/free-tiktok-that-you-dont-have-to-download_GM835599320.pdfIn PDF document text
    • https://agoramedia.ro/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://agoramedia.ro/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://agoramedia.ro/images/roblox-cheat-engine-fix_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • https://agoramedia.ro/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://agoramedia.ro/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://agoramedia.ro/images/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://agoramedia.ro/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://agoramedia.ro/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://agoramedia.ro/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://agoramedia.ro/images/free-robux-co_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://agoramedia.ro/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://agoramedia.ro/images/free-spin-link-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_004_off00004ff6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF6 26564 bytes
SHA-256: cce08b5d9de3e703c27c081fcec678efe6b03e3e781663e5ec772d48145f1355
font_01_sfnt_off00008d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D24 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000099cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CC 19000 bytes
SHA-256: 27ff3af2641ed24556d68d64280f8e4eeb93874a7aacfac31522269613e6d9a8

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