Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d93a37b5a4bef97…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 13:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 96221e48460d93df1ae264cd72bfc7dd SHA-1: 352ee168285ca0617f515190818119a89f7a0c71 SHA-256: 4d93a37b5a4bef976b96763d5597b186b69ec754083e60bf82c2248cd7cf27cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic firing for a game hack redirect lure, pointing to a URL that promises unlimited game hacks. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the primary function appears to be redirecting the user to a potentially malicious download site.

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/406889139/coin-master-32-mod-hack-unlimited-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-gang-gang-gang_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-bots-free-game_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/working-redeem-roblox-cards-free-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-follow-a-player-everywhere-he-goes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-codes-get-robux-absolutely-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hacks-and-cheats-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-robux-free-sin-pastebin-2021-con-jugar_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/mad-city-unlimited-money-hack-roblox-2-26-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hackeando-mi-saldo-de-roblox-sin-pagar_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-shirt-file_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-gift-card-pins_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_off0000318c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318C 22932 bytes
SHA-256: 322732f628850058e0833aa5822edcbade68b3dd400b2c0fa6a05071a5e18b79
font_01_sfnt_off000064ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 18996 bytes
SHA-256: 37ed63e74a535a76445230d9c7f377bd7b9b2eaccd5f624491c1f2f15b22ef77

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