Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d17e324ea38a26…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 12:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a9816c852b3185ef564220782a93ee49 SHA-1: 6828078b78aeaa04e9dc306a2309db0e119e7c5c SHA-256: a0d17e324ea38a26e9a1809329a1e7b3417fc0396abc7a5f217c8b3c0fdc7e6f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'free Robux' or game hack generators. The document body and heuristics confirm the lure is to download or access these 'generators'. The ML classifier strongly indicates maliciousness, and the embedded URLs are the primary indicators of compromise.

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/431946152/free-robux-download-game-hack In PDF document text
    • http://hostalsalou.eu/images/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://hostalsalou.eu/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://hostalsalou.eu/images/roblox-free-robux-hack_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_003_off00004b19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B19 26520 bytes
SHA-256: e9e3251c765765e6d423ac723db5d8b6a488c6f56fa9e9fa9b01d985232622e2
font_01_sfnt_off0000885f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885F 18824 bytes
SHA-256: 8406cb1c38774726d91b6a9fb5333918f35ff34bd7dcb56cd5a50b6af28a82ee

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