Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b044900c3737e9…

MALICIOUS

PDF

46.9 KB Created: 2021-05-15 15:42:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9d7818ed6d29e6c374df910a67154120 SHA-1: 84006f9713ea4e6484cf82c6579c813d4b1cbaa0 SHA-256: 16b044900c3737e9a23c4be2ee443056504910a621ce20e6c6f2207d2f005623
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors and sites offering free game currency or hacks, such as 'microsoft-roblox-rewards-game-hack'. The document body, though partially corrupted, contains similar URLs and text suggesting a lure for users interested in game exploits. The presence of these links and the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/microsoft-roblox-rewards-game-hack In PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-source_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/wurst-18_GM479516143.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzsuihe.com/Public/upload/editorfiles/coin-master-free-daily-spins-link_GM406889139.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_off00004bed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BED 26184 bytes
SHA-256: 96611f63b62bc26a4c45315bd0f0e2d4536201d804d55f077e0091a5761591a0
font_01_sfnt_off0000893d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893D 2936 bytes
SHA-256: 916b11be10f0ffa1ebd680d716301a4082435ec0602a7356f5ccddc80b512e8a
font_02_sfnt_off00009362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9362 18772 bytes
SHA-256: 885cbd3f72e53b67117bb4048e91371d45fd893deaab7f6141eb78c54bb681fd

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