Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f84978f9300f93…

MALICIOUS

PDF

37.9 KB Created: 2021-06-25 11:15:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9034937151b2e8ac6798a291db48d52e SHA-1: 16f6cb78b2c5690f237233a9c6ac60804c4b6c84 SHA-256: 19f84978f9300f93fa8f47caf7ddc0fe1cc6af83fe2db31b8ddcefca515f71c0
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 0.9985

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/free-roblox-cards-not-used-2021-game-hack PDF link annotation
    • http://perpus.poltekeskupang.ac.id/repository/tiktok-free-hulu-account_GM835599320.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/guuudd-info-roblox-online-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-admin-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-insect-no-waiting_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BE1 22608 bytes
SHA-256: 55b5bcf77c35726fbb1abfc8b6df8037ddebec7c6cbfd11e638eb84d53e576dd
font_01_sfnt_off00006e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E42 19328 bytes
SHA-256: 35594e14dfa24fd523c7ec90490afc62f719862a3bea67312bb207f0c93741a7

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