Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf9496c8e0733ec…

MALICIOUS

PDF

48.6 KB Created: 2021-06-09 01:58:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a92ac2a04dd7b309ac55c9064b57a895 SHA-1: 244c44268058fe57247d9fca6ba18cc4e447b372 SHA-256: caf9496c8e0733ec1d7a980212f3f485beed5f9577a80c07f7ffc84e64666594
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-free-robux-without-human-verification-on-phone-game-hack PDF link annotation
    • https://www.fhccu.com/images/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.fhccu.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/free-tiktok-fans-no-verification-2021_GM835599320.pdfIn PDF document text
    • https://www.fhccu.com/images/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.fhccu.com/images/roblox-attack-on-titan-cheats_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.fhccu.com/images/coin-master-free-100-spin-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
font_00_sfnt_off00004f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0C 27692 bytes
SHA-256: 469cdd4bacff8751cfe594d4997cbb82bf91297cecf1e2f36839c2ed38a6f57c
font_01_sfnt_off00008e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0B 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off000097cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97CD 19544 bytes
SHA-256: 6dc1e387b7a4150b932b9212fb000d6881bebdf2b3fd2dfc00977df39d7fe863

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