Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20f6138767c835b…

MALICIOUS

PDF

45.6 KB Created: 2021-05-14 19:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 77ecb9486364ed6006a5db68be1dafca SHA-1: 9bdf12017ed1838f17280529deead1342f1253ab SHA-256: c20f6138767c835b2aded224ecccfbf4b387943a87b440f888086c2cf7c092f6
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 0.9507

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.xyz/app/406889139/coin-master-free-daily-spins-game-hack PDF link annotation
    • https://www.humanityera.com/uploaded_files/userfiles/files/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/robux-website_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/rbx-robux_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://www.humanityera.com/uploaded_files/userfiles/files/coin-master-deals_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
stream_003_off00004c63.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C63 25484 bytes
SHA-256: 56f5e9c1b65d1a32d9634edf69281e24feb4be97699983db9d841261ce7d6e9a
font_01_sfnt_off000085eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EB 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9D 18308 bytes
SHA-256: 5c3cefeee4a209382fad51155f4ab19c665f35dca270fe96ae1b58d23c3d8f95

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