Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3440f42ba6b274…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 20:03:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a29e6a398d05a7a57530fe2527a0035a SHA-1: aa2c72fc0a9234310c25160c98546555fd40d66f SHA-256: cf3440f42ba6b2747de32c068ca9b59a2d777f2e7bc14c52a64d1a970a7c5591
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs further supports a phishing or scam attempt. No scripts were extracted, but the document's content and heuristics point to a social engineering attack designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/earn-free-robux-on-roblox-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk//repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-typical-colors-2-hack-script_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/flying-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-hack-apk-2401_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-para-tener-robux-rapido_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/i-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-promo-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-adopt-me-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-jailbreak-hack-2021-october_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-game-download_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_off0000300a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300A 22804 bytes
SHA-256: 9950cc885f3aa2e9cf59a9a94a201927616dcb93bbfc300d8ce3713dfb151290
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 18788 bytes
SHA-256: af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478

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