Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b9a540914f897f…

MALICIOUS

PDF

44.1 KB Created: 2021-05-13 11:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 99154c4859d296f6d694af41d3c28f65 SHA-1: 2b1d470f192e3e2a26c378ee53e78694c85ba498 SHA-256: 22b9a540914f897f7eef5c37f7643b182d4f09a23034d00ff4313a8976f15897
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body, though partially corrupted, contains references to these lures and the malicious URL. The presence of these links and the heuristic firings strongly indicate a phishing or scamming attempt designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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-free-spin-and-coins-links-game-hack In PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://hometech.tw/ckfinder/userfiles/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005300.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5300 24896 bytes
SHA-256: 96dc8bf50f83a446df9efcb6fab6174e264d48e414c82fb45c222537024fa2e4
font_01_sfnt_off00008a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A46 18228 bytes
SHA-256: ab1c4cdc214a6baf81a15e2f62a40ea9cfbbbf407f0f3dd1c7564e467cf0dae2

Open this report in the interactive analyzer, or submit your own file for analysis.