Malicious PDF — malware analysis report

Static analysis result for SHA-256 403cf438080dd656…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 04:51:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f8c08dc0c2810f34b1be2becc656cefe SHA-1: 98d1cc2e581e6d2cba9b4e497a25f81369985289 SHA-256: 403cf438080dd6560e8d834412e44e9ef44caecd37d96acf0e69e7f66c8bf0a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for game hacks and free generators, directing users to a known malicious redirector. The embedded URLs and document body content strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-links-that-don-t-expire-game-hack In PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/rare-free-links-to-coin-master_GM406889139.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_003_off0000491a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491A 24496 bytes
SHA-256: ae03b40b27fc195ab9d3146e061525c212951f7b858a59031b7893304d62898b
font_01_sfnt_off000080eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80EB 18436 bytes
SHA-256: dce3e1f078114056c7a9f64f23754c2b9e2cd17dc36a219649f8cd9aa09ae054

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