Malicious PDF — malware analysis report

Static analysis result for SHA-256 385e5727bc810d3e…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 05:33:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f27278b8291c743830f3b9dce9dceabf SHA-1: abade231ca154b79334b9d227c715d96ffce57b4 SHA-256: 385e5727bc810d3eb6bc0d029060890e8f1ac211411701b76ffcfffc5bf58896
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack, directing users to a malicious URL. The ML classifier strongly indicates maliciousness, and the embedded URL is a primary indicator of a phishing or redirection attempt. No scripts were extracted, but the document structure and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites.

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/406889139/official-coin-master-free-spins-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/pokemon-go-free-quest_GM1094591345.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/real-free-robux-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_off00005195.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5195 25144 bytes
SHA-256: 834ec43960c8f15bec09a9da11cdb755c8e3ce4121408e96000288ae835f0899
font_01_sfnt_off00008ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ADE 17960 bytes
SHA-256: 566edd865edd8744df8e39a8001e850e6dcbcdadb3e6ad7cdaa37e096c94fcb6

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