Malicious PDF — malware analysis report

Static analysis result for SHA-256 524b642f7d8fd735…

MALICIOUS

PDF

48.7 KB Created: 2021-06-03 20:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e1ca35598a86d6cbae42ae536147cf77 SHA-1: f848636fddc698892995ab6034b48eacdd5f56c3 SHA-256: 524b642f7d8fd735034fa0b212edf77a1ef83ed10affce42cc559cd93232a302
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators to entice users to click on external links. The primary link identified, 'https://netcdn.online/app/431946152/how-to-make-a-private-server-on-roblox-for-free-game-hack', is highly suspicious and indicative of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 4

  • 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.
  • 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.online/app/431946152/how-to-make-a-private-server-on-roblox-for-free-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pubg-uc-18_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/who-hacked-ezrahandjacob-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-on-computer-free_GM479516143.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_004_off00005334.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5334 25616 bytes
SHA-256: 250163c086b22ec32e5dc73feee86a1db49f0ddfc6bd68a30455c7b6c1570a8c
font_01_sfnt_off00008f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F46 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off00009906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9906 19196 bytes
SHA-256: b86313febfc454b426d55667776bc2f57fbcac051d8b12890de5d5336413d825

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