Malicious PDF — malware analysis report

Static analysis result for SHA-256 9699aa99561af456…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 09:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3d40b5bdb1e4aff0de94e36ebb2d8dde SHA-1: d39af616b0a26b0fd3a3276a4c51a45e20657090 SHA-256: 9699aa99561af4566ea21e2d86c27cd846378056488eceaa5ca7f49513e85917
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/flee-the-facility-hack-roblox-game-hack PDF link annotation
    • https://satuoblong.com/ckfinder/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://satuoblong.com/ckfinder/userfiles/files/free-robux-gift-card-codes_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_off000052c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C3 25372 bytes
SHA-256: 9d22c80869db641822fa8ae89436ea3d68d3a33a778f470c2a8ed6ba396d7009
font_01_sfnt_off00008bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BED 18916 bytes
SHA-256: bc6a2e665f38b3a9b2449c196d5564809f7363ff75fb9fee45fe6dff2136fb8b

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