Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57a85253c98ed96…

MALICIOUS

PDF

33.9 KB Created: 2021-06-27 16:36:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d95c7e5631508f0eb816b10fd3038eef SHA-1: 089fe538b4513644e0187c64bc453f1342aafa4e SHA-256: b57a85253c98ed96e51d683d63141dc6e49f0d45efacb91361e9fb68b4293ae9
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.co/app/431946152/broken-bones-roblox-hack-game-hack PDF link annotation
    • https://library.iuli.ac.id/repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-rewards_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/can-you-buy-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-human-verification-or-survey-no-email_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-just-by-inspecting-it_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/insane-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-booga-booga-fly-hack-may-26-2021-mojo_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-in-roblox-jailbreak-on-ipad_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-tix-and-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-cheats-no-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/khaos-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/unsopported-smoke-flight-roblox-free-copy_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_off00002e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2B 22560 bytes
SHA-256: aec7dbac012059ece74e87a0153f1425f1c9192b979e5e04bdb6e2906a525a15
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 18656 bytes
SHA-256: a38e3b0bedece58040f5caf30f8778d2162c911a130a9aed0e79afd5e586ec70

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