Malicious PDF — malware analysis report

Static analysis result for SHA-256 d199b5c61923447b…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 09:21:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 258ff7a052aa8fc36d50ea18adf6fefc SHA-1: e27d80d846a178cb7e2a039d839fa756a089aa4b SHA-256: d199b5c61923447b4de2eb6df0e6f314830c45f0970fdc65044e4de39b082e18
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 0.9980

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.tw/app/406889139/spin-and-coin-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/fog-removed-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cheat-engine-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-shard-seekers-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/does-the-roblox-hack-work_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-teleport-and-wool-and-speed-and-money_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-roblox-on-a-computer_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-codes-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/seiten-zum-robux-hacken_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-server-free-trial_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_002_off0000317f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317F 22604 bytes
SHA-256: 2bd4a7f4d405a804c950c01bbc5a52c72c59f4b4d9407c54a9c9f01229af3a13
font_01_sfnt_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 18080 bytes
SHA-256: 012df21d0068cf60c223a53958773a0d059661452b676895ba6a235f4df9029a

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