Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf610228e3062d36…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 07:35:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e98b63f68a49d7e513952c03f9f4d49a SHA-1: 005cd4f61da382a37706e9a8cf618d6390ba7a8c SHA-256: cf610228e3062d361298d6aa02dd314a9b991cc001a6774a8536791ea222944a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that promise free game hacks and currency. The presence of a call-to-action button and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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.co/app/431946152/roblox-script-hacks-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-robux-hack-no-survey-no-password-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-in_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-ios-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/pin-codes-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-star-codes_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-hack-someone-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/como-descargar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-rich-roblox-accounts-passwords-2021_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
font_00_sfnt_off00002fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD1 22240 bytes
SHA-256: 4cb3cf5845509fd7b78263ce1870974108cf2eebbe20f47f74e2787a1d12dca6
font_01_sfnt_off0000615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 19056 bytes
SHA-256: d579aac1d1158a15ad46381a3b3d03b5c9b37299ce5790291e99ad749e5be703

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