Malicious PDF — malware analysis report

Static analysis result for SHA-256 883c40f01f944297…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 15:56:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 502495391c92353dcb0d9809aa3a1b4c SHA-1: 7c09ad79ef864037b3278d2f2ca98e3fda56a9b2 SHA-256: 883c40f01f944297a34b50e13b089d06d5ff437ebef43da7e1479a2f68217f77
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/coin-master-unlimited-spin-apk-free-download-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/pastebin-free-robux-by-agarminer_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/youtube-greenlegocats-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/my-roblox-group-got-hacked_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-codes-free-price-game-passes-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-code-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-codes-2021-july_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-game-snow-shoveling-simulator-cheats_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-anything-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/open-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/best-level-7-free-script-injectors-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-college-textbooks-tiktok_GM835599320.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_off0000330e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330E 23040 bytes
SHA-256: 9f0dc61c41d7c7eab0d261860e09d307cd642a2a6e8fbb1222516604f1f78a93
font_01_sfnt_off000066dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 19368 bytes
SHA-256: 8b0685dcc048d8507013793e7e40f4e8e130d168f30120dc551c0829f220b5a1

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