Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7781f86073dca5…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 07:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2f637ed149f20f5115c6339b97f6d11a SHA-1: d322632fcc7de3cf09cef655efd759442ee0b7ca SHA-256: 3c7781f86073dca55ff9e23d855cb26842c0f5071115d230fc4313bef30be9d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/roblox-lumber-tycoon-2-infinite-money-hack-game-hack, which is designed to trick users into downloading potentially malicious content. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or malware distribution 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-lumber-tycoon-2-infinite-money-hack-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/free-h-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/tiktok-free-gas-hack_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-how-to-get-robux-with-cheat-engine-63_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cheat-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-no-hack-on-ipad_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-speed-hack-2021-new-code_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacks-for-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/como-hackear-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-without-human-verification-2021-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-dino-cheat_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-injection_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_off0000309a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309A 22468 bytes
SHA-256: 8044b26f5b6b48f8b3346f6b7334ece17bf44a150a2ceba7c87eee1b2d3decd8
font_01_sfnt_off000062bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 19780 bytes
SHA-256: 88bde2206bd0bc05c894e923b472be8c49612ee2a4597f3bb082bacb2cb5ac54