Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc715731e9d59ced…

MALICIOUS

PDF

50.4 KB Created: 2021-06-08 10:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 25357d4d7c2392759366b4b04d6b2e51 SHA-1: 04cacd898fbfb59ee67846e3fe75f651b1539a23 SHA-256: dc715731e9d59ced4e19da3ae1c8de0ffafb5ffb2e2d24d69fd61489401a685b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game hacks to entice users into clicking a link. The primary link, https://netcdn.tw/app/431946152/how-to-get-free-roblox-jailbreak-hacks-game-hack, redirects to a malicious website. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or redirect to a phishing/malware site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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-get-free-roblox-jailbreak-hacks-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/774-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-com-hack_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_off0000519a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519A 35888 bytes
SHA-256: 60d0dfbe872db48068bce251fdaf289348c91f343ca83ea935d88b2758a5548a
font_01_sfnt_off0000a0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0EF 18900 bytes
SHA-256: da787e68d7d8d4a089ccf1487a389f49dc7da398392a15db5a1a3846851df742

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