Malicious PDF — malware analysis report

Static analysis result for SHA-256 5039386eb9f26111…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 00:46:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ba00798ede7ffb1c9c7a465a778e213e SHA-1: ac8e4d3329ddf4b18a87e3323ea3d2038a1d4e54 SHA-256: 5039386eb9f261110f92867bfb0c3f845a7b1801a62d78a8c440c457d3c952b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is https://netcdn.online/app/406889139/free-spin-and-win-coin-master-game-hack, which is associated with a known malicious redirector. The document body, though partially obfuscated, contains references to similar lures and embedded URLs, reinforcing the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spin-and-win-coin-master-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000504e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504E 25528 bytes
SHA-256: 75bf49bca368055e6b04e6d85a342955aaec4d821029b8f5598a1259234a4b4c
font_01_sfnt_off00008aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAF 18256 bytes
SHA-256: 9a1b20d80f3e4f809c9a9d9b8851ebdec2d0bde394b804bfd21e1aa58c8059b7