Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ef5ba2a998a42c…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 23:08:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b9b448feb6088fcdd317d9aa828b53a9 SHA-1: 312e72733e8080f16f5b877547aa4db8e558e11a SHA-256: 57ef5ba2a998a42c0a197b1e9215d8c0b4e3698011312af841e3cf0563464170
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 0.9971

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.xyz/app/431946152/get-robux-com-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C6 24720 bytes
SHA-256: 314eb3e1a7c03031122f169bb635d86ec074ca3bcce3bdcce1e6646bd9be9fb9
font_01_sfnt_off000080cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CF 18216 bytes
SHA-256: e46bf0cf057cdcc1f24e49826db2f5998f04ba9e64eff7e45517ce854ffbd61c

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