Malicious PDF — malware analysis report

Static analysis result for SHA-256 04af6b72d2a0ab51…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 23:20:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 17e5a957f8b363708dade2745df23a5e SHA-1: 805d31b4a04a2d0e05a37aba597eaded4e9d0098 SHA-256: 04af6b72d2a0ab51f81f1818a180c7428ff92438ebebc3c6b3db278b7704e8c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, advertising 'Free Robux' to entice users into clicking embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-no-verify-2021-game-hack, is identified as a redirector to a potentially malicious site. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a social engineering attack aimed at leading users to a phishing or malware distribution page.

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/431946152/free-robux-no-verify-2021-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/bexggg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-free-emotes_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-800-robux-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22460 bytes
SHA-256: 704f8c6df7b127c0b8ee5e07852c17bfa54facbed5d315272aab9bee1f5f99fa
font_01_sfnt_off00006173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6173 19552 bytes
SHA-256: e09a116ef2773d205446325b2d9f1a936106eb792045e06ccc5d6ea31c8b4aca

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