Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f431d726e370ea6…

MALICIOUS

PDF

45.9 KB Created: 2021-05-12 14:37:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fb75861a698eef31c48d5af2c4e4ec7 SHA-1: 2cdbf5c5c8ce154607f2a2e80386a1e75e2dca57 SHA-256: 2f431d726e370ea67d7936a3fd2a89832c8b796892eb2103f9431d6c41a9ddf8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and spins to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts multiple other PDF files, likely serving as a multi-stage download or redirection chain. The ML classifier also flagged this PDF as malicious, supporting the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/todays-free-spin-and-coin-links-game-hack In PDF document text
    • http://generatorgallery.com.au/images/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://generatorgallery.com.au/images/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://generatorgallery.com.au/images/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://generatorgallery.com.au/images/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://generatorgallery.com.au/images/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://generatorgallery.com.au/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://generatorgallery.com.au/images/xray-hack_GM479516143.pdfIn PDF document text
    • http://generatorgallery.com.au/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://generatorgallery.com.au/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://generatorgallery.com.au/images/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://generatorgallery.com.au/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://generatorgallery.com.au/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF9 25296 bytes
SHA-256: bbed788b75222714394e7bc07b777b861aa8a567bb46c278c7be0947fc2b1c2f
font_01_sfnt_off000085d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D5 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off000090d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D9 18304 bytes
SHA-256: fe41b9c6f73a07cbbf88dd054bef46cc881cfc19b14a93a0ff48235cedd50557

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