Malicious PDF — malware analysis report

Static analysis result for SHA-256 e016160c4511445c…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 09:52:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bfda28ae7545df58079867bae96e2238 SHA-1: 85fa5c7e4f600e05e350fddb7785cb0097a1afd9 SHA-256: e016160c4511445cd5f1d5d6fa2eaeed108cbb2c75e88a5fe90cea1d1879c1db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with 'game hack' and 'free generator' themes. The primary malicious link identified is https://netcdn.online/app/406889139/coin-master-free-spin-and-coin-links-game-hack, which is likely intended to lead to a second-stage payload or phishing site. The document's structure and embedded URLs strongly suggest a social engineering tactic to trick users into downloading or visiting malicious content.

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/coin-master-free-spin-and-coin-links-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-play-roblox-for-free_GM431946152.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_off000050b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B2 25392 bytes
SHA-256: 453d786cc3ddb9f037f6e343e3120f97c93de7bbfb4ccc1078e70a821d8f8837
font_01_sfnt_off00008a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A03 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

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