Malicious PDF — malware analysis report

Static analysis result for SHA-256 150a281be2aafa88…

MALICIOUS

PDF

35.4 KB Created: 2021-06-20 00:48:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a132d50224ad04c29ca976201294a422 SHA-1: 0b5ee8d52912e594397970cdc5c37615326349f5 SHA-256: 150a281be2aafa88001a6d7a8a8041b84ff1d971b87c82ed79bd076d701f219c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux and game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded links are consistent with phishing or malware distribution. No scripts were extracted from this sample, but the document's structure and embedded links indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/promo-code-that-gives-you-free-robux-game-hack PDF link annotation
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-look-cool-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-roblox-promo-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/scratchyofficial-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes-that-work_GM431946152.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://www.smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://smkn1kutaselatan.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-for-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
font_00_sfnt_off000031f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F4 22180 bytes
SHA-256: 4de5c5095c7a2e125772fdcffbb7b2cf29d156e97d09dba9197d2e1920f93e4a
font_01_sfnt_off000062dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 19972 bytes
SHA-256: 449ef876a473b47667e12d07a95c8292f985cb653e2d25b5c345ed6f92ad7519

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