Malicious PDF — malware analysis report

Static analysis result for SHA-256 5750e2e07fdfd62a…

MALICIOUS

PDF

47.3 KB Created: 2021-06-11 11:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 051c6892b6715b3ddb61f98a954ab44b SHA-1: ebe61c46cebd2f65a831a981cc59863034554856 SHA-256: 5750e2e07fdfd62a0f155d5c1f75736bff34d2892d906f92a753411f9626ad21
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9832

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/5-games-that-promise-free-robux-game-hack.
  • 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.tw/app/431946152/5-games-that-promise-free-robux-game-hack PDF link annotation
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-free-robux-games-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-draw-alpha-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/dark-dominus-roblox-codes-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-trading_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/ggame-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-and-limiteds_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-freer-package-roblox-2021-july_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-download-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_004_off00005345.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5345 28820 bytes
SHA-256: 69592f3551a67099eb70d480d940b85516045947ebb2cfe6fb0e5368dea6893c
font_01_sfnt_off0000943c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x943C 19180 bytes
SHA-256: 373eaf111d61b75f6aaeb5740f8f8a273b81b81dbc641e2733d9a60862e6cf91

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