Malicious PDF — malware analysis report

Static analysis result for SHA-256 1953de88c9f82bb5…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 15:19:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b9a2a9e832aadde8603aa2df9ceec3c0 SHA-1: a69ba66cd9df0dd9b155f40e9270d52db249992a SHA-256: 1953de88c9f82bb522e5391e0f4c3d8d186df4661b3fd1bef118483fda082f08
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/431946152/free-robux-proget-games-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-hack-ios_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-into-roblox-money_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-forbee-swarm-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-working-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-robux-generator-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hackear-roblox-server_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-your-hacked-account-back-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/no-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/como-hackear-jailbreak-roblox-2021-dinero_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-glitch-site_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/body-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-promo-codes-roblox-wiki_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/avatar-the-last-airbender-roblox_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_off00002d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D61 22540 bytes
SHA-256: e4b8c531cd590a13e26d31bcdff499600667d04fbdefc3107ac626c796a25f4f
font_01_sfnt_off00005f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 19232 bytes
SHA-256: 1af7a7a11f869a1622d8729c344f3125e9050ae7a4731a8f9b7a4465bf745c65

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