Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5ed97d13c1504a…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 00:52:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8652bed71b93db1160c7cc9ff2a2aa6d SHA-1: e948cb574c640e494a933ede7335d2fbfddc0ea6 SHA-256: fc5ed97d13c1504ad16632fa8cb8fd7c1b355338be7922fbf762bf88950d93ef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free game hacks' and 'free robux' to lure users. The document body, though partially corrupted, contains a URL that aligns with the heuristic findings. The primary attack pattern involves social engineering through a fake generator/hack lure to redirect users to malicious infrastructure.

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.tw/app/431946152/free-roblox-bots-game-hack In PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-robux-gift-card-20210-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/works-how-to-get-free-robux-2021-fast-amp_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-use-a-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/admin-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-dll-cheats_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/genewin-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-shower-simulator-cheats-for-time_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-items-robloxcom_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/hack-meep-city-roblox_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/roblox-free-card-codes-december-2021_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/robux-hack-alan-walker_GM431946152.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://zosnow.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-from-the-robux-page_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_off0000511e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x511E 25044 bytes
SHA-256: 4fc56479fd02f14ce109dc7a10c3cb5b433053a6390bb8eb6a9efe223d3bdb5a
font_01_sfnt_off00008afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 18052 bytes
SHA-256: 5dc9337d0eb8ec367eb8a363e2c78e2218e0401128b26e553fe5b5f6f336af76

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