Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cfa871bffdfa35a…

MALICIOUS

PDF

33.1 KB Created: 2021-06-19 17:24:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fe3ba999c79880af9321b0b15e28ee62 SHA-1: d6a651703dbb9e0edbeb058db55e9f2596c9a23d SHA-256: 7cfa871bffdfa35a632c2fa91fbd6e8280463644cbe6a1786a802738e6dc25a6
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 0.9824

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-do-you-hack-peoples-account-on-roblox-game-hack PDF link annotation
    • http://digilib.pustaka.unand.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-jailbreak-cheat-codes_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-hack-no-scam_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/hack-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/infection-inc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-codes-gift-card_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-skywars-how-to-get-free-coins_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/hack-para-android-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/face-added-by-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/nonsei-diamond-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/dayz-roblox-cheats_GM431946152.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_off00002a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A60 21844 bytes
SHA-256: abbb7bbfd8da00acdfe63e1d1b1e5527bf23c0fbe192e2a5eae41d98371b7b61
font_01_sfnt_off00005a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4E 19724 bytes
SHA-256: 66fd2e88883d4472f3300ad0b1f3688a081ef4757c973d4bc87a6d2c7422c60d

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