Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b341b0d90a680a…

MALICIOUS

PDF

35.0 KB Created: 2021-06-18 04:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2f9328f20e383dfa07ab0a5d18db2192 SHA-1: 4a647363eb0bb25ad1fe794661a5c20ed4b2a2d1 SHA-256: d1b341b0d90a680a4f4231cc5a2d257c1cea89b933d7dc06cc17f053c0cd6744
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links disguised as generators or hacks for popular games like Roblox and Coin Master. The primary link, http://netcdn.co/app/431946152/how-to-get-free-animations-on-roblox-with-roblox-studio-game-hack, is flagged as a game hack redirector. The document body and heuristics indicate a lure to download something potentially malicious, possibly an archive requiring a password, which is a common tactic to bypass security scans. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.co/app/431946152/how-to-get-free-animations-on-roblox-with-roblox-studio-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-no-survery_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-font-free-download_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-tools-for-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-infinite-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-giveaway_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-esp-hacks-download_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_off000030de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DE 21952 bytes
SHA-256: 8b9aa24ed190a1108d72720b6acdd9a67ed041ef551c51e4ef1837419ffd7c7d
font_01_sfnt_off00006147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 19976 bytes
SHA-256: 0586764b911e70a121c20a501eb8ab375a567e38d1e21e5cb233cb480e2495ef

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