Malicious PDF — malware analysis report

Static analysis result for SHA-256 2287c1cd346e110b…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 15:36:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 07526ee24e5c80f8a5502b466ce1de97 SHA-1: 2719bf2454de86d0780fca508cd5ee04bca5ea97 SHA-256: 2287c1cd346e110b018698b482ca9befa33ca4a6795b96374e1abb02abef23d2
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-spins-2021-game-hack PDF link annotation
    • http://rightlead.com.tw/image/data/files/roblox-games-for-free-for-kids_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/rbx-free_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-hack-aug-8-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-hack-bleu_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/codigo-hack-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-find-roblox-hacked-servers_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_002_off000032a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A0 22972 bytes
SHA-256: 7eff02c2ed3eec7cf706caa8684da340b740213811d215e70fdcf6515a691019
font_01_sfnt_off00006651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6651 18580 bytes
SHA-256: 6b892b9fd4654575e99ccb234c4ea42ce3a143afb594a9f5bbba6d9504894d46

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