Malicious PDF — malware analysis report

Static analysis result for SHA-256 facae3f0c009b5fd…

MALICIOUS

PDF

42.7 KB Created: 2021-05-19 00:07:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 622753713083a12e4991f2ed5cc3cf4f SHA-1: 79cc6d3bb20f41a9b700b334d07f7e6106730b6b SHA-256: facae3f0c009b5fdd3837323d9f98f3878d627914383cf75f5b307e2d04ad5be
168 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, disguised as a 'free generator / game hack' lure. The document body, though heavily obfuscated, contains references to game hacks and download prompts, reinforcing the lure. The ML classifier also flagged this PDF with high confidence. The embedded links likely lead to the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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
  • 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.xyz/app/479516143/client-minecraft-game-hack In PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-coins_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://vinhoshortencia.com.br/media/ckfinder/userfiles/files/coin-master-hack-ios-download-2021_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
stream_003_off00004c97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C97 26924 bytes
SHA-256: 36c1281e244043d8e1000a61ec3e185f5561cb3fa8f7477dd0bed0b5c8a3b257
font_01_sfnt_off000086e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E5 17644 bytes
SHA-256: 5ce6a379ae9f46d42512ba88e57e1f5186d7f60265a685918f3434c96255be0b

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