Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2c92036975e10c6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 16:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 511549b31b6dfcf21cb377007faf5fd2 SHA-1: 804812942872b3739bb18e6aac1f12179be4edf5 SHA-256: a2c92036975e10c6234f05268e2f1c18e85655b90c865ed5febb6b0cf52aa0c6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic firing for a 'free generator / game hack' lure, directing users to the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-youtube-game-hack. This URL is likely used to deliver a second-stage payload or conduct phishing. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking the malicious link.

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/how-to-get-free-robux-youtube-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-free-watermark_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/promo-codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-gamepass-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/good-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-downloading-anything-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-there-a-way-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/aimbot-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-pants-download-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-promo-codes-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/fake-roblox-online-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/nexus-hacking-roblox_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_off00003152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3152 21776 bytes
SHA-256: db994cef906e9c214a409654c0bc1caa841f6b731224a3fe2b8438b9c387036d
font_01_sfnt_off00006145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6145 19144 bytes
SHA-256: 69f15bf39f48ef2819c4fe30de5c54b763846b00a79d58176de4c37c6d2b833d

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