Malicious PDF — malware analysis report

Static analysis result for SHA-256 77eb546679ca17cb…

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 13:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ff3d100a5213e311f4df0fdebd936bb8 SHA-1: a20038a2ca0a7eac55efb6a3d87200e94eb3fcbd SHA-256: 77eb546679ca17cb0fcfb6fb2115b90957fe27b2a269f1b20016da96ddafa613
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links promising free game currency or hacks. The primary malicious URL identified is https://netcdn.online/app/431946152/how-to-get-free-roebucks-in-roblox-game-hack, which likely leads to a phishing or scam page. No scripts were extracted, but the presence of these lures and the ML classification strongly indicate a malicious intent to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-get-free-roebucks-in-roblox-game-hack PDF link annotation
    • http://library-fkip.uho.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-play-games-and-add-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pubg-770-uc-ne-kadar_GM1330123889.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pubg-uc-free-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pokemon-go-free-4k_GM1094591345.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
stream_004_off00004f4d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4D 25556 bytes
SHA-256: 9865d86a385e07718449e85c2e72f61d345f45e81a550aacdf971aa90ab61334
font_01_sfnt_off00008ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC9 18524 bytes
SHA-256: 6a418ba74ae5328d563bd5a35238a9b9c08fdc9000a9cbda284a157467e29bc0

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