Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9973c417c29f9e7…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 18:26:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fb3fde6977a48cc1be13e399d3f54319 SHA-1: 3c9d37eaa7db78bcbe17c62d9f1a9fc0e8ca26a2 SHA-256: d9973c417c29f9e7c8f3e2e5b5fe514d3f874c7f7abbac1efeb89f27ddb89eb4
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 0.9769

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/coin-master-hacks-for-pet-food-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-without-downloading_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005076.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5076 25252 bytes
SHA-256: 054590b1c1f52a6b7e67d271aa6d531cc90cf63d5307187e5e86a2017cf2d9c3
font_01_sfnt_off00008a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A79 3124 bytes
SHA-256: a0e4a5f378f23ac829e40ef1a0638115ffab18b17acd7561ed9b637601232063
font_02_sfnt_off0000955b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x955B 18208 bytes
SHA-256: 0a85b2d7244c9e40f4d30b416f1cc788558934a6ad40aa5dd3e45362a865324f

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