Malicious PDF — malware analysis report

Static analysis result for SHA-256 930e0640d80643e0…

MALICIOUS

PDF

43.7 KB Created: 2021-06-09 17:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f489280782c1067c51391c47a8a0aefd SHA-1: 850a5f7d9a8baa06c91641380eb2d90874c00347 SHA-256: 930e0640d80643e02c3fd1f8e3198e522dbe658b0f8e8ee6197a9717bfde0094
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites, with a primary URL identified as a lure for game hacks and gift cards. The heuristic firings indicate that the PDF is designed to redirect users to potentially malicious content, likely as part of a phishing or scam campaign. No scripts were extracted from this sample, but the embedded URLs and the nature of the lure strongly suggest a social engineering attack.

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.tw/app/431946152/free-roblox-gift-cards-that-can-be-used-unlimited-times-game-hack PDF link annotation
    • http://stpc.it/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/hack-noclimb-roblox-2021_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/how-to-have-free-clothes-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-robux-place_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://www.roblox.coIn 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_off00004f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F7C 23768 bytes
SHA-256: 60234e9316f5f4493d18b65c45f52a0108b771fe592ad95266441c8034be4147
font_01_sfnt_off00008598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8598 19188 bytes
SHA-256: 4ebe856204d712ac060bdcb69ed8dc3979846d33f6580390114e9654776bbc1a

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