Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49e5caf1bb5d45d…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 07:07:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d93a8cd83cd87b5d405d6a335d528a15 SHA-1: 642acf5413ca2684158644ae49dd5ab1140c3e98 SHA-256: a49e5caf1bb5d45dec71188ce508824291412c5675e3271041e5950e1d295dce
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/406889139/free-daily-spins-from-coin-master-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-on-a-tablet_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cheat-roblox-lifting-simulator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/gamecraft-org-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/do-you-get-free-robux-with-builders-club-2021-bonus_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-bubble-gum-unlimited-candy-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/inject-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-a-acc-with-btools-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-a-free-skin-in-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-minecraft-account-list_GM479516143.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_off000032a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A8 22872 bytes
SHA-256: 6a265ac2b5128bcc6d4fea4e606af072c7c99f9f4bfb25b7cbf2a7ed9f77aec9
font_01_sfnt_off000065f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F9 18856 bytes
SHA-256: d310d8b42a9db28f952d6c808dbfd2c0798e16e205ce104a4cdcfe428c53c924

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