Malicious PDF — malware analysis report

Static analysis result for SHA-256 555724f20292f8af…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 02:42:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 06d1260faad3b25df2ee54df36dde8b9 SHA-1: 1042cfc5583a54b722e4a1a1a9991e393bd5a8c4 SHA-256: 555724f20292f8af2f745701838cea392e82f730d652cdf84db26642470fbace
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 0.9969

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/how-to-make-a-group-on-roblox-for-free-game-hack PDF link annotation
    • http://digilib.akbid-alsuaibah.ac.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://digilib.akbid-alsuaibah.ac.id/repository/wurst-hacked-client-112-2_GM479516143.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_off00004af0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF0 25268 bytes
SHA-256: 8c122ecadc2d2f8926df5f26edc60f954c2378afcbe1f26a97f087534f850e5f
font_01_sfnt_off00008427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8427 19020 bytes
SHA-256: 618aa5fa104ea73151876125e2b85ad7dcdc11323aacc6b5e0056594e37eb48c

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