Malicious PDF — malware analysis report

Static analysis result for SHA-256 865e37d79211a287…

MALICIOUS

PDF

33.2 KB Created: 2021-07-03 20:44:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8200f15a45b0ffe01e66e24e3b318c12 SHA-1: 183220d28061767978803bc7b7f2917546a8e366 SHA-256: 865e37d79211a287d3174adc32426a84d22b9f70f55af2fde3e8cedda85767b3
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/431946152/how-to-get-free-robux-generator-game-hack PDF link annotation
    • https://learnwmf.org/image/data/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/robux-hack-no-survey-or-human-verification-no-downloads_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-a-lue-injector-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-booga-booga-hack-download-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-2021-november_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-studio-hack-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/can-you-get-robux-for-free_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
font_00_sfnt_off00002d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D07 21668 bytes
SHA-256: cf540b9ce3819e8d5fd79dd17cf70b455662aeb448d21174ac1f0e30df45ec16
font_01_sfnt_off00005cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB2 18984 bytes
SHA-256: 9ace3a26ef8593b997a2527bb5fc552eafd0119b2772e901bbb9c059dfbe5502

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