Malicious PDF — malware analysis report

Static analysis result for SHA-256 3458c3ff72dde5d2…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 07:45:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f1ad22ed399eba1ede2a4f26a7699aeb SHA-1: eeb89496a2a33cabad36f3cad67846dad6f9544f SHA-256: 3458c3ff72dde5d27b3f9b18394fab319f94984fec80b218f08ac646a5e2e9fb
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 0.9998

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.co/app/431946152/roblox-feed-your-pets-hack-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/www-roblox-com-free-games-at-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-2021-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/tiktok-free-tv-shows_GM835599320.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/lila-plays-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-into-someones-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-400-robux-promo-code_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-galaxy-makeup_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-spin-ml_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
font_00_sfnt_off00002ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA4 21888 bytes
SHA-256: d0dc0fe9819644e8b7cc3282f8c883e4f2ddfb36f155291455ab91a3cfe351d2
font_01_sfnt_off00005f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 19556 bytes
SHA-256: 7fbe0f5ac2401030a6335723d01ecca5ec13f6ce18b9bde5cdd1e75bee12836c

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