Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41636adbbbb4537…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 09:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d8d464596fec86b80d51dd141fa49a38 SHA-1: 790433542d6e5aba301b6ca58605627879c59269 SHA-256: a41636adbbbb4537c1cb7df2da1eebd927ffc0482479275d3e6716ff8574b108
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and game hacks to entice users to click on embedded links. The primary link directs to a malicious URL, indicating a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded URIs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/free-robux-obby-easy-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/www-bandicam-com-free-robux_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_004_off00005227.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5227 26440 bytes
SHA-256: 3dadc4a6c12629071580f50e692af6aeb8c05923e196c18bd4bc5cb1410d73b5
font_01_sfnt_off00008f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F37 18420 bytes
SHA-256: e3d556280128f89f5eb960444baba17f3500fdb93a948c7e99be8a3f22e5dc5b

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