Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f341afc1da14a6…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 02:04:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 48c1c40ba7ad930b02079b99af9e016a SHA-1: 139d9b6b0fdda5f4716003d453209210de7c5c83 SHA-256: d9f341afc1da14a63da4cf89b4612db9bfcb88eaeb85413fa92ee25943b8d693
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run 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 0.9432

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-minecraft-server-hosting-game-hack PDF link annotation
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/easy-ways-to-get-free-robux_GM431946152.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_off00004c8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C8F 25928 bytes
SHA-256: bfbe219889b914775ee30cbad29cb228ef7956593957799bafc434d1de6792c8
font_01_sfnt_off000087bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BD 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00009194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9194 18112 bytes
SHA-256: 3722fe831b56fbf324865bd98e985c80b873b4d61fb4aa2a64332cfc2a086223

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