Malicious PDF — malware analysis report

Static analysis result for SHA-256 0332db5ae6b749be…

MALICIOUS

PDF

45.9 KB Created: 2021-05-10 23:00:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 135d8b67abe072055533218ae5491190 SHA-1: 31888ace38e9726913d2770f02a386d4a21b1a51 SHA-256: 0332db5ae6b749bea13907dc9e63cdbebb7569362474b958fe91abf632cc5805
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to websites offering 'free Robux' or game hacks, which is a common lure for malicious content. The document body and heuristics indicate that the primary goal is to redirect the user to a site that presents a fake CAPTCHA or verification prompt, likely to trick them into downloading further malware or providing credentials. No scripts were extracted, but the embedded URLs and the fake CAPTCHA lure strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-gift-cards-game-hack PDF link annotation
    • http://algierimasonry.com/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/robux-boost_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://algierimasonry.com/images/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://algierimasonry.com/images/how-to-get-free-coins-in-coin-master_GM406889139.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_off00004bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBB 30376 bytes
SHA-256: a0eda0112ba6433a8567413eeab2f9ba0a6d9425d3babd3d836a7d9fc98472c3
font_01_sfnt_off00008fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBC 18804 bytes
SHA-256: db707177e1a0df533614fd289cf2b470ee37edf039339bb568c3977480a042bc

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