Malicious PDF — malware analysis report

Static analysis result for SHA-256 81aa73179d5c1368…

MALICIOUS

PDF

33.4 KB Created: 2021-07-09 22:39:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9bc89473b20a970068ece4cb318fb586 SHA-1: e56855ad6400ea32821137a47ade39a8585f5d6a SHA-256: 81aa73179d5c1368b32e1a3158fcce01b2a5061e815052a502cc27bd85ebe3fe
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/cone-master-game-hack PDF link annotation
    • http://elr.manubaba.com/__statics/gudangsoal/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/cone-master_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/roblox-hacked-pour-avoir-des-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/www-coin-master_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/hack-exploit-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/how-to-counter-hack-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/roblox-injector-hack-2021-synpnese_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/how-to-make-hacking-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://elr.manubaba.com/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_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_off00002fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC1 22376 bytes
SHA-256: dfc1ec6cf16de044eff1b88e14b71361c9b831e017c0d44f03e9b53043b557af
font_01_sfnt_off0000615a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 17712 bytes
SHA-256: 1d2b8c84664aeb21ec7d812a4df566ec291b937f93597c41560adcddb13db525

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