Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cb1371f389f35c…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 02:25:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 898965e3a250e0d5ce033dd6c645c352 SHA-1: 5d68d2b79afe22ae5042ef95930febf68457dfcb SHA-256: 69cb1371f389f35cf4c8a43cddaf905c074e1c9cb9d0be71fe73f05096b0ab3a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9865

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.online/app/431946152/hacks-to-get-free-robux-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-generator_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_off00004f71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F71 25000 bytes
SHA-256: 512809ad209e8d2e4b0a204ba81affd4c5406586cb752507a2d0ceb6cf1f8430
font_01_sfnt_off00008926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8926 18516 bytes
SHA-256: 49067203d4eb86d04ddf999d64ba4750afe8b15cea6fed862c5ee30987f881c1

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