Malicious PDF — malware analysis report

Static analysis result for SHA-256 8620e131b9f85057…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 17:18:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8335c515fa2d8279a434893630435220 SHA-1: 17b1ed6a45052aa0e8410e50f16161348e9fe01a SHA-256: 8620e131b9f85057b488ff68f2f0a438fa36ab18feed3273a18a9660f516b7d7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The embedded URL, http://netcdn.tw/app/431946152/offers-for-robux-game-hack, directly supports this finding. The document body also contains this URL and other similar lures, reinforcing the phishing pretext. No scripts were extracted, but the primary attack vector appears to be a social engineering lure leading to a potentially malicious external resource.

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/offers-for-robux-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-promo-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-shirts-xxtentacion_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-avatar-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/infinite-money-hack-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/tiktok-free-package-dialog_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hacking-clients-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-speed-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hack-for-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-vehicle-simulator-money_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_off00002f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16 22508 bytes
SHA-256: 610e8ff1508f17a3c8879da277314bca8ec751fbdf068d868266354f6340fe38
font_01_sfnt_off0000613c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 18716 bytes
SHA-256: 8d914f591b961f6adc2557f1f8343ca58ebd685e787bc1d2708e35d4dab4cef2

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