Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78be0f18968644e…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 18:27:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cd5f566cab7b7c8ea419a6c03ce1f275 SHA-1: b0e2fa3d1cc8251d4fcd59cfc47421d47d2d9b08 SHA-256: b78be0f18968644e4162dc08210a1efec7dd0fbd46d4f3a5396c5edef62cbb3e
76 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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-spin-hack-no-human-verification-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-with-out-human-ver_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coin-master-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/good-watch-dogs-hacking-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-royale-high-diamond-hack_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_off00002f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F63 21972 bytes
SHA-256: 8c5e2a9513d9d76743fdd406d7585801ec77ea8dfeeaf9c85e5ee32200ae76cf
font_01_sfnt_off00005fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE2 18712 bytes
SHA-256: 6bd8c5d5e55df37c4823c99c38113fd1d5645e117952cb5bdf76cd2cbfea4fcf

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