Malicious PDF — malware analysis report

Static analysis result for SHA-256 f593140a8711bfc5…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 05:13:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0ec23cdbc60615d18a76257faa75fcb6 SHA-1: b3df08689527a003b1ab68a1c1f6125cc94767e3 SHA-256: f593140a8711bfc5802576e47e16650784b586664f0d5c7ba63492b724f77cd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to a URL associated with game hacks and generators, a common lure for malicious downloads. The heuristic firings confirm the presence of malicious redirector links and a game hack lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into downloading a second-stage payload.

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/406889139/hack-coin-master-no-human-verification-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-admin-commands-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/hack-de-cuentas-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-catalog-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/game-on-roblox-free-items-on-the-catalog-no-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-how-to-check-a-games-anti-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-cheat-engine-bypass-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/does-free-robux-work_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-ban-people-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/fashion-frenzy-roblox-play-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/how-to-hack-a-minecraft-server_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_off00003407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3407 22880 bytes
SHA-256: a60d6dd0fed452af5f3f1836cbcbb199b5e5990bcaf2e79df4c7445b1547d253
font_01_sfnt_off0000674c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674C 18540 bytes
SHA-256: cd7885bd0141873d48a200c26faf1a5b7e84495b723be12c592fcfdcd6c6cc24

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