Malicious PDF — malware analysis report

Static analysis result for SHA-256 082bacc758f3d766…

MALICIOUS

PDF

46.4 KB Created: 2021-06-11 03:07:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5c6e0440d25506299281953c9f116e8 SHA-1: 2b44a6e9b807a1bca9c7d7ecf67c4ee4c82a2573 SHA-256: 082bacc758f3d766cc6537903fd93c0c8555d6f537453b6cd3cf6936a85a2893
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 0.9832

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 https://netcdn.tw/app/431946152/how-to-fly-hack-in-roblox-deathrun-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-download-roblox-mm2-hacks_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-cheat-codes-no-phone_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/seitama-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-gift-card-codes_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
stream_004_off0000514a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514A 27828 bytes
SHA-256: 7b1a14eabd33efabd44eef280fd6a8b951aaa2e68860036826365b1d8c16360b
font_01_sfnt_off00009036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9036 19268 bytes
SHA-256: 8c906dad8c066324cb0ffd6ea6f902dda434b351ab2bc4b66cd7237d549014e1

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