Malicious PDF — malware analysis report

Static analysis result for SHA-256 7376ca1b3281f484…

MALICIOUS

PDF

35.9 KB Created: 2021-06-30 10:52:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7c017edb1cb662b8891924d5130ba0c8 SHA-1: ac4d18b6f6d332b470c66f226d00d4405fe18b8e SHA-256: 7376ca1b3281f484facb0b146cfbac34156ca023467b54b4cae0e43ac6437ba6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "free Robux generator" and links to a suspicious URL, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into downloading potentially harmful content.

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.co/app/431946152/free-robux-download-app-verification-hack-game-hack PDF link annotation
    • https://repository.stikesindramayu.ac.id/repository/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/100-working-robux-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/tiktok-free-hearts-apk_GM835599320.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-unlimeted-robux-for-free-with-copying-notes_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-catalog-hack-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-scam_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-green-scarfs-for-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/jail-break-roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/telecharger-hack-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-hacks-jaibreak_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/cops-and-robbers-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-free-body-bundle_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-free-link-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_off00003387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3387 22148 bytes
SHA-256: c9f52936aaf44b55b2ed523bd598560be3bdfd4ea525e27a5883368954089e33
font_01_sfnt_off0000645d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 20000 bytes
SHA-256: d68449c19e3668c0a93c415d3ec248a5c9e6e2be0833b99d23fc75f444fe2cd2

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