Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbec1b5a85665d9…

MALICIOUS

PDF

50.4 KB Created: 2021-06-03 14:54:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 311026f33641fa45cb9bfc0252410519 SHA-1: b153e523b62a9bb0bac63464e1db2c7c08214283 SHA-256: 0dbec1b5a85665d9b401c487b40d65cdac24c3aff66ba171d8e95172a13e0cb2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The primary lure URL is https://netcdn.online/app/431946152/free-roblox-accounts-dantdm-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/free-roblox-accounts-dantdm-game-hack In PDF document text
    • http://library.umla.ac.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/april-1st-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000508e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x508E 29968 bytes
SHA-256: 55d4f3cf7188ce11fe4006898fb1c9393e1627522910579f4b61f025ee126cc8
font_01_sfnt_off0000936c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000a014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA014 19020 bytes
SHA-256: fab1cdea1c90721c250ad49de139f00c3e6c4251d6a59756d793536ca2bf5ae4

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