Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f5a7e433a1e0a97…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 02:02:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d938ac9079de75075944425daa3dec1a SHA-1: c11cded64b76d6edbec99c85039bc2bd619dc5e0 SHA-256: 8f5a7e433a1e0a97cdb62c3ec231c9b726eb82268bd499f3ac51bbc9f924992f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' and directs the user to a suspicious URL. This URL is likely part of a phishing or malware distribution scheme. The ML classifier also strongly indicated maliciousness.

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/free-spin-link-for-coin-master-game-game-hack PDF link annotation
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-westover-islands-cheat_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/legit-free-robux-websites_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/cerberus-free-download-roblox_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/unlimited-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-become-a-admin-in-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/free-random-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/tiktok-free-like_GM835599320.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/20210-robux-free_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/just-create-free-robux_GM431946152.pdfIn PDF document text
    • https://mawaridschools.com/uploaded_files/userfiles/files/tiktok-free-6-months_GM835599320.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_off000034de.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DE 22872 bytes
SHA-256: 6ba4617cf8ab1ca84e47923ac51d677fcff8ab072eeffa4d64a0467e36a57e61
font_01_sfnt_off000067d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D3 18604 bytes
SHA-256: f19d54f8b55e9054799c5fe3eb3858f8baa86cd1dd79e15d2a28d3659dcc94a2

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