Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5f5cf48e61b7aa…

MALICIOUS

PDF

36.4 KB Created: 2021-07-04 00:55:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d74e4ec9de772aab6498737e88f0a4d SHA-1: 4a13bc6fa2f21de69fdcfdf034c64b58d1c69cc3 SHA-256: da5f5cf48e61b7aadba3b3410e71581f681c71c7f27e0befdccd888d6b0782a5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-minecraft-in-roblox-and-more-naval-ships-minecraft-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-real-gift-cards-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/costume-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-teleporter_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-actually-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/jailbreak-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-ghost-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-unblocked-free-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-xlothroblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-really-easy_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_off00003461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3461 22804 bytes
SHA-256: 08d62342f49ea6a2a94a455ccb5cd069aaf77936ce94a1aaa7bc7767e66e2f20
font_01_sfnt_off00006788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6788 19700 bytes
SHA-256: f30c879c06449fe28da9ff94be5a3c97778b97d7819854aa46836d33aab7a985

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