Malicious PDF — malware analysis report

Static analysis result for SHA-256 735d956eff3eae85…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 23:19:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 72d89f4f74887f541e64e8c144483dbd SHA-1: 9f118da294dddaf209190b0db35a8e318bd897d4 SHA-256: 735d956eff3eae85281f3c2bf7d7ba443a7107d0679c82dcc59505dcca13bbd5
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 0.9864

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.online/app/406889139/pop-slots-free-vegas-casino-slots-machine-game-coin-master-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cheats-for-coin-master_GM406889139.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_004_off000052fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FA 25024 bytes
SHA-256: e1be5841f2b8438f6360737c239c4e265cf892de5f6d6eb784d19adf67148a6a
font_01_sfnt_off00008cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD1 18960 bytes
SHA-256: 1c2867144f4dcbe006f7dd1ea5adad3b4b3257689db3166d94319e477c45a36b

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