Malicious PDF — malware analysis report

Static analysis result for SHA-256 b413e97b89e3b668…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 02:22:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4a7d81509a7e4ce09a1dea3fcc0e84db SHA-1: fa4b4cf8d2d8548e18bafdf424dc787604272058 SHA-256: b413e97b89e3b66874fe8be81127aeb2701c0adfb0ccdf279359731985f257c8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a lure for game hacks, specifically mentioning Roblox and Coin Master, and includes a link to a website that appears to host such content. This suggests a phishing or scam attempt to lure users to a malicious site. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/how-to-hack-any-roblox-account-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/is-free-robux-illegal_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-redeem-codes-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-toys-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-robuxking_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-candy-van_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-executor-download-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-vip-server-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-robux-now-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/account-hacker-roblox-patebin_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_off000031c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C7 22532 bytes
SHA-256: a4a8a35a22b96c1f124578d6b881d607a8676c3b562537d64502e27f3c2950c8
font_01_sfnt_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 19244 bytes
SHA-256: 6d65792bfd45bcee93e0a3a5c2653c8cc75893afabb3de85f48b4c2dd1390979

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