Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f040cc59d3e3d0…

MALICIOUS

PDF

45.0 KB Created: 2021-06-02 03:42:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 52564a22d460c253b0e136592d623f1d SHA-1: 5c1a319203621782647355a3c356a639befb2ee8 SHA-256: 92f040cc59d3e3d0fdd36dbf75c5344d7f2004d2bd5852a2b89e9bdc4d46f442
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the heuristic findings. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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.xyz/app/431946152/easiest-character-to-make-a-roblox-account-for-free-game-hack In PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-dominus-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-dubliezieren-hack_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-hack-sharder_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-upload-music-to-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-free-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-free-exploits-with-decompiler_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-com-cheats-for-money_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/black-adidas-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-seven-deadly-sins-online-script-hack_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/roblox-free-tshirts_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/comment-hacker-des-map-roblox-roblox_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/hacks-for-arsenal-roblox-mega_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/hacks-for-roblox-the-mad-murderer_GM431946152.pdfIn PDF document text
    • https://www.aubay.com/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.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_off0000536e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x536E 24272 bytes
SHA-256: 3f7b5a579ab8619494bbf16032360a8fc6056634a31dc4a6ba042df4058643c9
font_01_sfnt_off00008b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1F 19072 bytes
SHA-256: 3aa5c0ca7ef8488d4df9599d6bb9798812c94ca218dce83f518c8dbb92d3da4d

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