Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c378cee8444dc03…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 20:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 65f548c696c3f5875e34b1d7200d57d9 SHA-1: 9d0d0b59f1d3fa670948e14d3a1c2a73a3458cc9 SHA-256: 1c378cee8444dc03f403434decc28b0cb2c0d033cf9e20ca8850592fff198cc5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux and game hacks, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with scamming or potentially malicious content. No scripts were extracted, but the document's structure and embedded links 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/how-to-earn-robux-for-free-2021-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-cs-ro-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-codes-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hacks-robux-gratis-rapidos_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-change-your-roblox-name-for-free-working-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-followers-on-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-robux-hack-android_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-pin-code-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/best-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-mac-no-survey_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-roblox-accounts-2021_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
font_00_sfnt_off00002eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB2 22572 bytes
SHA-256: c6d80adf93902df75421a311891e0e1fe99b0a84e670509ee787d85390054cc9
font_01_sfnt_off00006102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 19284 bytes
SHA-256: b399ae733d7917559aeb38653f56690fc8d0842846df9d5376906f0eed96920f

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