Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddb59dc35cb52314…

MALICIOUS

PDF

32.7 KB Created: 2021-07-20 21:02:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 24e2c73c741288d10eaf9272e41ce1ec SHA-1: d6e018db79155357aa90423aec0451fbbba832fe SHA-256: ddb59dc35cb5231463cfeea5ef4fdaf87fbed4d685104514f6631dc3fab2f455
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and 'game hacks', directing users to a malicious URL. The document body and heuristics indicate a phishing or scam attempt designed to trick users into clicking the link. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/get-free-robux-game-hack PDF link annotation
    • http://rushxpress.de/images/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://rushxpress.de/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://rushxpress.de/images/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://rushxpress.de/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://rushxpress.de/images/free-minecraft-alts_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
font_00_sfnt_off00002ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE4 22704 bytes
SHA-256: 636158b17ec8d44c5cd01aa9f8c74463476be8f290146dd41dd976b73ebd9851
font_01_sfnt_off00005d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7D 18304 bytes
SHA-256: a623b0ac0ed72c2031e7f594d5c978448605d08bf0c9f56efadd1d348241356c

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