Malicious PDF — malware analysis report

Static analysis result for SHA-256 c577706f921993f3…

MALICIOUS

PDF

37.5 KB Created: 2021-06-30 00:35:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e762ff53f23a21b547ca93e33be3b7e SHA-1: df540d9af6c719cd5d41fcf1a0b5f6a0765e0a91 SHA-256: c577706f921993f35fed6c45153385872ba4756d080571a218d1edce21c4abc6
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 0.9981

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.co/app/431946152/how-to-execute-hacks-roblox-scripts-game-hack PDF link annotation
    • http://library.stembi.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-free-rare-knife-effect-twitter_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-card-generator-hack_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-robux-for-nothing_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-do-you-make-a-shirt-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/games-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/free-wings-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-hack-roblox-accounts-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/what-is-the-secret-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/teleport-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-cheat-buddy_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/roblox-fan-group-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/how-to-get-things-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.stembi.ac.id/repository/get-bucks-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AA6 22580 bytes
SHA-256: 99e8ff01c0a4c5019a609073a04ee1800e247f8c004b50193ec6e925dab5f357
font_01_sfnt_off00006c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C94 19360 bytes
SHA-256: 83ea6234997459abb776bb9470f34c06781afce69d06707074608016bc89d4c0

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