Malicious PDF — malware analysis report

Static analysis result for SHA-256 42939d74e49eeb06…

MALICIOUS

PDF

36.2 KB Created: 2021-07-20 01:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9226c580c0931622a9ea91ee9553f7fe SHA-1: 504f86ee2344f667fa6e72a017cf27fd5681965b SHA-256: 42939d74e49eeb06a19106db2123b1cbe356bfcda7f98e00768f3d4247abc8c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of "free game hacks" to entice users into clicking a link. The primary link, http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-2021-easy-game-hack, redirects to a malicious domain, indicating a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in game cheats to deliver a payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-hack-roblox-accounts-2021-easy-game-hack PDF link annotation
    • http://genialica.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://genialica.com/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://genialica.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://genialica.com/images/how-to-hack-roblox-accounts-2021_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
stream_002_off00003256.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3256 23620 bytes
SHA-256: 38a15fdd66e5898d7b2434f6b838615fa58f43c8012d4dfab6d1737224901df5
font_01_sfnt_off000067f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F7 19360 bytes
SHA-256: f0ce80f5b9d5efe1c1018aaa801c8eca9f68d74c87ad0987669da43b4bcf3d99

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