Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5f6122b9eaaca0…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 09:07:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d249049f8750feb0e377a729415468c5 SHA-1: 02325a06b635caf24fadd7cefb4d4acb7db71b9c SHA-256: 1c5f6122b9eaaca0d4698dc0f41fdcc0463828cad716fa29d7e3bf593a6de026
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-hack-spins-apk-download-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/best-free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-robux-free-button_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-robux-hack-youtube_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/youtube-hacking-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-clothes-website_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/cheats-for-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/the-labyrinth-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-money-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-mining-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-for-free-without-signing-in_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-apk-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/strucid-aimbot_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
stream_002_off0000318f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318F 22592 bytes
SHA-256: e7561e74fb719eaf509437acdbb325bcd1526fe0bbd9a5f9e4976b3407b43435
font_01_sfnt_off0000642e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642E 18760 bytes
SHA-256: 2227f84ce27906078fb9307e5966f095ea5b1ebc9f5a2e217f4f7ff334ad3631

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