Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4cc7fcac52cd98…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 19:20:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 72cc1a7ff90f396d9754e03cffbe1437 SHA-1: 5bf25154380269e38b411b5ad14da9e349605f22 SHA-256: 7d4cc7fcac52cd987b0e4844467757c4f9f58d21b0cd40ab5b2b11a5ed912b9f
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 0.9980

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 http://netcdn.tw/app/479516143/minecraft-java-edition-free-code-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-peoples-passwords-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-on-roblox-in-3-simple-steps_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheat-engine-roblox-shut-down_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-script_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/tiktok-free-100-views_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-mining-roblox-hack-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/best-free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-be-a-hacker-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-clothes-on-roblox-without-bc_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-promo-codes-for-robux_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_off00002ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF0 21712 bytes
SHA-256: 5b167816d4aec07da46790934130f4b8e410b8b6fc291cf35b05bc215b07d9b1
font_01_sfnt_off00005f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F92 18452 bytes
SHA-256: c88fc963111c99bd76411e48cc5f7a93ca1ac40d038cb8251833f774ecd296b3

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