Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa8867f7d69a29f0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 01:26:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d8cefbfd9988b77c7cadd9f31fbd76ff SHA-1: fcf61cfe0c5dc07a82d53a7b1e0fd59e43115346 SHA-256: fa8867f7d69a29f0f5bb8d936b07599b10eab49747f23c6b4e148dc6a1428797
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/431946152/robux-for-surveys-game-hack. The document body and embedded URLs reinforce this theme, suggesting a lure for users seeking in-game currency or cheats. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt.

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/robux-for-surveys-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/games-like-roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-jailbreak-games-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-cheat-engine-bypass-october-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-gg-uardika_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-phantom-forces-hack_GM431946152.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/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/deadly-sins-online-roblox-working-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-website-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/italwhts-the-best-free-horror-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-minecraft-for-free-on-android_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_off00003041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3041 22432 bytes
SHA-256: 2883e419c8fbb38eda64989be5c496254f405e249b76a7d87886557e194148a4
font_01_sfnt_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 19012 bytes
SHA-256: ec184981cee40d5be8dde6e660a66024581cf2de0c7acf7d26948343a0b944f2

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