Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b23d1d2c3047c9f…

MALICIOUS

PDF

40.7 KB Created: 2021-05-10 13:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ce7423b95bc8c3ab6fef6a0e502f4840 SHA-1: f6600362b1558c3b318968048b9d4f8ce60abd08 SHA-256: 0b23d1d2c3047c9f1dfbb63bed28f85aa3d1a32255032abc91853adce18e6b34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'Free Robux' and a high-risk heuristic firing for a game hack redirector, pointing to the URL https://netcdn.xyz/app/431946152/free-robux-no-human-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely initiated via a spearphishing attachment. The presence of multiple related URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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 https://netcdn.xyz/app/431946152/free-robux-no-human-verification-game-hack PDF link annotation
    • http://lawnn.ru/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://lawnn.ru/images/earnrobux_GM431946152.pdfIn PDF document text
    • http://lawnn.ru/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://lawnn.ru/images/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lawnn.ru/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lawnn.ru/images/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000037c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37C6 24172 bytes
SHA-256: eefffeca8b0b8715ca4ca7e4009c74d8a92ad0ebe5f0d003033dcf52da5451cd
font_01_sfnt_off00006ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA6 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00007b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 18860 bytes
SHA-256: 7bf6b254896799c3550cbaf8339a45bd8c79022df116fd793fc899e49cde55bc

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