Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34a17acab1c8d71…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 15:39:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 14b91aff0e473e0615a8281c50c7c89b SHA-1: f919e8caff9382cef8745791417ff5d4b0877851 SHA-256: d34a17acab1c8d71d2231ec900b8372ad185158ce402083cfc0ef8a95f4c264f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to known malicious redirector infrastructure, specifically advertising 'free generators' or 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/roblox40com-robux-game-hack. This suggests a phishing or scam attempt designed to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent.

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/431946152/roblox40com-robux-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-fly-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-converter_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-mighty-lion-card_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_off00002fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA7 22476 bytes
SHA-256: 379ebafd1ee6c8c1c6d36803f7866d8023d54c70d648dc52b42bd283d2cf22b6
font_01_sfnt_off000061be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BE 19120 bytes
SHA-256: 1da81d55382e1c31fd4c6d9ed48754b7b1fca039527ac4466b5c20815f286d1d

Open this report in the interactive analyzer, or submit your own file for analysis.