Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba8b87062cfd75b…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 20:46:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f766449d1cc9b1f1ae1a46aad1edabf SHA-1: 2a957620eadeb4fefca90e61d390f122956a66dc SHA-256: 4ba8b87062cfd75be3724661dcf94f23fc1b9fd7d3303aaecf113aa306405298
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary lure appears to be a 'Coin Master Hack 2021 Apk' hosted on netcdn.tw. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the embedded links are the primary vector for this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/coin-master-hack-2021-apk-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/flying-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-highschool-money-cheat_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-instant-kill-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-explot_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-script-executor-free-download-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-hack-2021-youtube_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/top-free-rthro-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-any-game-hack-script_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/pubg-uc-qatar_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000335a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335A 23400 bytes
SHA-256: 441e408273efeef2b392c446b7bbed6ff8bd7e744f0c4affd025ad68e7c562ec
font_01_sfnt_off0000685f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685F 18580 bytes
SHA-256: 9ee7f6e729eaa8ccfa60f836f488dcd9dbdf367b2dcb4736acc286b6369c8b6e

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