Malicious PDF — malware analysis report

Static analysis result for SHA-256 e304757290eeaf1e…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 21:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0273f7c938bf0cd2d09841164038935c SHA-1: c2a422eb76b8d29aed7be29cf0646bccc2529555 SHA-256: e304757290eeaf1e9bfededa6ad7ed342fd88791287f9badc205a2a5123034ef
82 Risk Score

Malware Insights

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

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-no-apps-game-hack. This URL is likely part of a phishing or malware distribution chain. The ML classifier strongly indicated maliciousness, and the presence of external links in a PDF is a common vector for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-no-apps-game-hack PDF link annotation
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/como-hackear-roblox-para-tener-robux-en-pc_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/without-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-robux-100-no-human-verification-no-app-download_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/gamescraft-org-roblox-hack_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/roblox-hack-999999-robux-movil_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-to-hack-for-more-cash-in-roblox-wizard-tycoon_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://e-kbm.man2ska.sch.id/__statics/gudangsoal/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.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_off00002c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7E 22260 bytes
SHA-256: 5b7210827d9b48fd8b35070e9509bd4e262fb4aee7ca2faf5df28684917e5741
font_01_sfnt_off00005e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 18892 bytes
SHA-256: 97ed903b38fd4786c0dda88a4c185f49823bb440c2c092ab01e4ff3737a3784b

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