Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac71eb682d32b40…

MALICIOUS

PDF

45.9 KB Created: 2021-06-04 01:09:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1c6d49fd4be464092c405b973a4ef2d4 SHA-1: a9a771f416d0035134525ce83fb6211002ab4a38 SHA-256: 9ac71eb682d32b40d9a022a035bc8db3db1a4e99f9715f9495bd81ff343fe784
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.online/app/431946152/roblox-hacking-website-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-match_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/mathep_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.communes.comIn 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_off00005176.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5176 25996 bytes
SHA-256: d3c36ef1878f0177ea47c4152e131fad2c953b64df99a8a19db5e6c8532148ec
font_01_sfnt_off00008eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB4 18892 bytes
SHA-256: e7d47ce6402ad6c34a9dd837b4455ddf5104770abd157e72eb2d384f2e13ef46

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