Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b584f6c478aff77…

MALICIOUS

PDF

46.4 KB Created: 2021-06-04 04:13:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aee53e5139178b251aa840bbfd5c2db9 SHA-1: aa47ddb5feba075ff352cb9915d519d9cfd43d02 SHA-256: 8b584f6c478aff77fe4a67d2a456f533b752272f48357a2aae71f07e01a6544d
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 with promises of free game currency or hacks. The primary URL, https://netcdn.online/app/406889139/free-spins-coin-master-2021-no-verification-game-hack, is flagged as a redirector for game hacks. The presence of these lures and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/406889139/free-spins-coin-master-2021-no-verification-game-hack PDF link annotation
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/sites-to-get-free-robux_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
stream_004_off0000505f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505F 30120 bytes
SHA-256: 6d8415bdc6fde7a1a619bc4935b1bcbef525263e89b0a651cf30447568c7ddc5
font_01_sfnt_off00009244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9244 18420 bytes
SHA-256: 57b0a04a26879f0d3434b42e55f704f41eabe83a94c97134347b08b555bbb634

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