Malicious PDF — malware analysis report

Static analysis result for SHA-256 764b35223163daac…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 12:12:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6352e23a6fc076ebacbf1892fe76dbb8 SHA-1: 9d8d30b2a3ad9482fbc5633ff7d878f36faa19f9 SHA-256: 764b35223163daac51842817f3b6e75cd6bb2dbb3954da832335f7c2c6b26379
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a 'free generator / game hack' lure, specifically pointing to the URL http://netcdn.tw/app/431946152/claim-robux-game-hack. This URL is likely intended to host a malicious payload or lead to further phishing attempts. The ML classifier also strongly flagged this PDF as malicious.

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/claim-robux-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-do-people-get-robux-without-hacking_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/pokemon-go-vs-free-fire_GM1094591345.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/near-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/hacking-tool-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hacks-2021_GM406889139.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_off00003093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3093 21992 bytes
SHA-256: 337b7240c06d12cd40cbd32ab67f38019d7d1c85447c771a1f8eb34a57fe7524
font_01_sfnt_off000060fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FD 19008 bytes
SHA-256: 2d699b59fae2859d2e8e824a2ab2ebb8118e4eb1d61ccb84239df2816aec8c92