Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae2116212d387870…

MALICIOUS

PDF

48.7 KB Created: 2021-06-04 03:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ca7624d444714a1e96fa231e4b4eb49 SHA-1: eb5d42f9c6223dc275acd28f18b3e1a22b575626 SHA-256: ae2116212d38787054f95ddf7236a9bc496d044ba3033a03d280f6f785d5019d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically a lure for 'free generator / game hack' content. The embedded URL, https://netcdn.online/app/406889139/daily-free-spin-link-for-coin-master-game-hack, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure for game-related cheats, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/daily-free-spin-link-for-coin-master-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-hair-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-weapon-cheat-codes_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_004_off00005285.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5285 27932 bytes
SHA-256: 6fcf01580e55266b3298cc359004bd825d1da3210cabaab5024ddc4331337f19
font_01_sfnt_off00009128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9128 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B12 18476 bytes
SHA-256: a1e2d053ddd827b51a873b4daf81e699df0b3bac0bfbdaf6be5e73db52a20702

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