Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf877fe2501b02e…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 00:00:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bfd41c288c5ad3aaef0702bcf8a215e4 SHA-1: ba40d48f752fff1980a3f37f0a90650cc2c3d7ed SHA-256: 0bf877fe2501b02e5a04934b40ddf512662e99d9874161b83a973c8890743f63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'roblox-arsenal-hack-script-pastebin-game-hack' URL. This URL is designed to lure users with promises of game hacks, a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL itself is the primary indicator of malicious intent, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-arsenal-hack-script-pastebin-game-hack In PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-minecraft-svg-cutting-files_GM479516143.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_off00004a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A21 25812 bytes
SHA-256: 981eb9a3cc198ca8286ca1f23bcba3314ec40378d3523c4390d05407d5bdebaf
font_01_sfnt_off000083c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C0 18736 bytes
SHA-256: 7de8619ef554dfe1f2192c4aca90399aa0815846f6a8f71df992d0e349aeb038

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