Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2ffafb80ab16b7…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 08:59:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 443995a57a9f8668ff7f4d4a309a6e89 SHA-1: dbd12a3f167b7c8f0ae3d8c6459de185230eb043 SHA-256: 8f2ffafb80ab16b710464e84471f44d17bf2af355a6106b310ed64eb47f6b486
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure related to game hacks and free currency, as indicated by the document body and heuristic firings. It contains multiple embedded URLs, with a primary focus on 'http://netcdn.tw/app/406889139/free-spins-coins-coin-master-game-hack', which is likely a redirector to malicious content or a scam page. The ML classifier also strongly indicated maliciousness.

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/free-spins-coins-coin-master-game-hack PDF link annotation
    • http://lib.akpnbahtera.ac.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-roblox-adidas_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/da-hood-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/top-free-rthro-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-roblox-clothes-no-gltich_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-do-you-get-free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/wurst-hacks_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
stream_002_off00002f93.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F93 22780 bytes
SHA-256: c5292a2954b629bd1c8e0d22eaf8d2d6ee870f08f81f115ca7bea2c76a3205ee
font_01_sfnt_off00006283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 18176 bytes
SHA-256: e8ec895f495d139acdb298d515a7ca0fffd25b58e102aa71b0a100d8abb1bbce

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