Malicious PDF — malware analysis report

Static analysis result for SHA-256 591a9c1774c8259e…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 18:18:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a67a77ce3f4e81e5120dc171f88f5d73 SHA-1: 7d61ef7143cb7911015fedf87e33abea3e22dccd SHA-256: 591a9c1774c8259e407fdfed9f59fc35679016186a8c63fa642509edae3ff567
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 0.9796

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 https://netcdn.online/app/406889139/free-chest-coin-master-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-shop_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005344.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5344 26400 bytes
SHA-256: 999c0e17c775021344ac231bcab2f31e40936d51b9e84449de20e80f9c3fc88d
font_01_sfnt_off00009019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9019 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A03 17876 bytes
SHA-256: b9576cd817a9ac0d3cf475fd9b67b7626b6608560cc7520ff0179b72c37f901d

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