Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe09810fb4917bad…

MALICIOUS

PDF

42.7 KB Created: 2021-05-13 05:18:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7ff4fba50f5a928b156f0e672ea5d62c SHA-1: 8d65dfa3eccc0853263ff497b749a85affe24788 SHA-256: fe09810fb4917badbd6409c45c9082e2b98fa2efbc2db9afc9dc35a56409ecbd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free currency generators. The presence of a visual download button and the ML classifier's high confidence score further support its malicious nature. The document body, though partially corrupted, contains URLs that are consistent with the lure.

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/406889139/20210-free-spin-links-for-coin-master-game-hack In PDF document text
    • http://fs4sms.com/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://fs4sms.com/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://fs4sms.com/images/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://fs4sms.com/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/rbx-claim_GM431946152.pdfIn PDF document text
    • http://fs4sms.com/images/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://fs4sms.com/images/daily-free-spin-coin-master-link_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_off0000490a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x490A 25420 bytes
SHA-256: f6e9247abdbc9e2fb384bb76ed2db079a9ffef36ddb470022fbc0e5873f83311
font_01_sfnt_off00008401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8401 18456 bytes
SHA-256: 0c2189e6946270650e490ca98f5793093c0c1550cf94812332a81fc346291d18

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