Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1ed6ac95ac82f4…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 18:33:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 62fe4f1d64fc635f6afac72b9d7725fb SHA-1: daf75b29e4d0a3f6b48bbb779b7d137c2579a43f SHA-256: cd1ed6ac95ac82f4701e33ad2823daf9f4a500a8c5a9a4d47c05322545038fbd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The embedded URL, http://netcdn.tw/app/479516143/how-to-download-minecraft-windows-10-edition-for-free-game-hack, is identified as a malicious redirector. The document body reinforces this by presenting a title related to downloading a game hack, further supporting the phishing lure.

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/479516143/how-to-download-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-any-car-free-in-jailbrake-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-5-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-fly-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-do-people-give-us-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/tiktok-free-tools_GM835599320.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-hacks-for-prison-life_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-project-pokemon-hack-vermillion_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/infinite-robux_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_off00002fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE8 21548 bytes
SHA-256: 3eee1fabf37ca171f9b2a889f773aad28d8398fb73282950da302194c6a253f2
font_01_sfnt_off00005f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F18 19056 bytes
SHA-256: 0faac838ec6b8cc333dbbf8bc12a16db18b66517912c10b8ca4c45f7cd28c043

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