Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b515c64917c2e5d…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 19:36:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7296acad67f02f08d32a8efc247aef1e SHA-1: 2a527b7cf6960675b112385665f3c2a6f660706f SHA-256: 6b515c64917c2e5d59a5477e73e33176d357055d6c2c15cdcfa2102c34c25bd4
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 0.9980

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.tw/app/406889139/coin-master-free-spins-hack-no-human-verification-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-online-free-play-now_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/account-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-gamecards-secret-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-exploit-visenya-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-bloxburg-free-bs_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/best-free-mask-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-one-piece-millenium-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-para-counter-blox-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-models-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-hats3_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/synapse-free-download-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-download-or-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.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_off00003240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3240 22324 bytes
SHA-256: 3968267c3d9f185a56602d37f5e2fffa6e91ce9d0604a06c761eef39e577f976
font_01_sfnt_off0000640c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640C 18880 bytes
SHA-256: 52bf7e01ff5d6494e622334a26eccef1bcc1b13c70471615843df61ad6900904

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