Malicious PDF — malware analysis report

Static analysis result for SHA-256 0540222fa8f80843…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 16:16:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6bddf114310d30f0596fb9dda3e14e14 SHA-1: 3edeaac1eefd8cf49c34421eef95f7099f3aeec8 SHA-256: 0540222fa8f80843cf4732783b49b70c40858dd222faef82d448d03d091be7c9
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 0.9832

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/free-robux-1-000-000-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/is-tiktok-free-on-ipad_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-online-link_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/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/testing-5-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/get-free-robux-no-verification_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_off00005080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5080 31344 bytes
SHA-256: edb35048ab7ea5c1de18c7c1233797c76553017a8837e8d63f8b68d99e587016
font_01_sfnt_off000094e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94E9 18292 bytes
SHA-256: 1767965f3766cdeeed104cb9a30b40000842b6e0bea0c85530f65299eae041b6

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