Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e76231237859951…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 03:36:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bde9fafc9709633911c7c43a55152de3 SHA-1: d76cad5ba4170ebd70795bf7d9ad9f782ba78f75 SHA-256: 4e76231237859951659ebd50aa48673262fb847a26a031b737a6f2bbfc89f2a3
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/rblx-gg-free-robux-game-hack PDF link annotation
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-get-bear-mask-free-roblox_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-hack-robux-hack-com_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-websites-legit_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/prokjs-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/best-all-round-roblox-gui-scrpt-hack_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-snow-shoveling-simulator-free-santa-bag_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-3-letter-roblox-names_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_off000031a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A8 21456 bytes
SHA-256: 3735787baa5435c791a4a8a7d653d115862c80774ac78d2f9a091ee7515b541a
font_01_sfnt_off00006090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6090 18788 bytes
SHA-256: 5272de1327d809a9ae728a26cc0e875a9c13a139e68b1b71e833ab0b807ac84b

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