Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1eb01977b511e4…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 21:34:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 429e2ba923f46edf1fd61a318c7f8a51 SHA-1: 11ded7bcf18ab73bc8fb737ed392f6186203ea94 SHA-256: 4b1eb01977b511e47cf4242c240b42ad3a5e6c050d549a1b288c32c98dc2e427
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/479516143/minecraft-free-minecoins-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/april-fools-hack-roblox-wiki_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-admin-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/download-roblox-hack-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-roblox-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-bc-only_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/jailbreak-roblox-hack-noclip_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/blak-berry-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-roblox-jailbreak-keycard_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/good-info-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-safe_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/easy-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-hack-version-free-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-in-roblox-iphone_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/vehicle-simulator-roblox-cheat-scripts_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cheat-roblox-lumber-tyccon_GM431946152.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
font_00_sfnt_off0000313c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313C 21812 bytes
SHA-256: 7e5e71c5d0f905574c4fd05ff47ab0b9d8996ba6b15855e084c72a6e26826289
font_01_sfnt_off000060da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DA 17996 bytes
SHA-256: 2dfa5331a9f2119d54c4e551e8437d7962f745d427a4edb313ce7568aa6bc23b

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