Malicious PDF — malware analysis report

Static analysis result for SHA-256 a687ee7428407ddb…

MALICIOUS

PDF

32.4 KB Created: 2021-07-20 18:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e21925b3b99aa48e44cb4fb7ef8173ab SHA-1: c3b8c07cc5a91dcf864d3bdc3e8d24082e2e07b5 SHA-256: a687ee7428407ddb648d1a4975cb5389bf7be2e66eed1044aceb82583ebefac5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a site offering 'free game hacks', a common lure for malicious content. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirect URL, which likely leads to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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/479516143/minecraft-iphone-free-game-hack PDF link annotation
    • https://www.lubar.it/wp-content/uploads/fsqm-files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.lubar.it/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-likes_GM835599320.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_off00002bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFD 22580 bytes
SHA-256: 9ce6e6ab536961faea36085edc718c5cbee48613d35280217f83bc1d11f901d7
font_01_sfnt_off00005da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 18052 bytes
SHA-256: d64526d0e07d457868d5eac688c0bc3e5c9817b8b07646f1be3e20c76e1ff486

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