Malicious PDF — malware analysis report

Static analysis result for SHA-256 5672f5cd54cbacb9…

MALICIOUS

PDF

40.9 KB Created: 2021-05-19 23:44:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2f8c0f439d5f64ff60a50733dae12445 SHA-1: 15b3cc8bda1a2aef6cff122bcdd946b650bc9037 SHA-256: 5672f5cd54cbacb966ab7f97a2c11810d266351574b5b1ecafe1282b8cdc1c74
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/406889139/cm-free-spins-and-coins-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-website-robux_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_003_off000045ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45EE 24436 bytes
SHA-256: a07be5c65475d387792c2a8158b0b4fdbc1c82b6a1cb13bd467c307ab32220d2
font_01_sfnt_off00007e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E61 17988 bytes
SHA-256: 6c27acc7e1a27f4dd98d9cdf7a00649578deada87f4d5bf77ad692372392325d

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