Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b70c5b904d945e…

MALICIOUS

PDF

28.9 KB Created: 2021-06-03 05:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a85abc7aa107047d6a83d4ffe5b2ce5 SHA-1: 5486e4798792780cf9c4e7fdebd4a21c0f889bc1 SHA-256: 21b70c5b904d945ede8718ca211d66a24b8c1d24353040ced9b99b62743cb831
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, identified as a 'link farm' and 'game hack redirect lure', pointing to websites that promise free game currency and hacks. The primary URL, https://netcdn.online/app/406889139/how-to-really-hack-coin-master-game-hack, is directly embedded in the document body. This suggests a social engineering tactic to drive traffic to potentially malicious or scam-related sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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/how-to-really-hack-coin-master-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-a-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-cards-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F2E 12934 bytes
SHA-256: 3a002816489d583f51d0c69ff25f50475461cac845998037489770cadaaab4be

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