Malicious PDF — malware analysis report

Static analysis result for SHA-256 815fad130a581b88…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 17:57:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a80fdf4fc3e0a8144198959abc51a105 SHA-1: 04b9bad95b83f0820c10e7a88bd33e9724d71c8f SHA-256: 815fad130a581b8812e43fb8a418eadd99d8102165adc9973f59c696fe4c76d0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary lure of 'how to get free Robux'. This is a common social engineering tactic to trick users into downloading malicious files or visiting phishing sites. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous game-related hack lures reinforces the malicious intent. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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.co/app/431946152/how-to-get-free-robux-it-really-does-work-game-hack PDF link annotation
    • http://sbm-nn.ru/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-do-you-get-free-robux-no-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-how-to-get-free-robux-in-seconds-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-hacked-download-apk_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-full-spiderman-outfit-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/descargar-hacks-para-roblox-gratis_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-clothes-website_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-exploit-scripts-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roblox-gift-cards_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_off00002db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB9 21124 bytes
SHA-256: aa2bbc362ae815855d2abcae261b8f34a06c02ad580fea07bcf964c105dbc281
font_01_sfnt_off00005b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9D 19588 bytes
SHA-256: f0f7b91bf6b79fff0f0ec0a9ffd7ad7d513f6a1f34efb37b160dd22af8875c0a

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