Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe3543d1fdbbb2b…

MALICIOUS

PDF

39.5 KB Created: 2021-05-10 11:02:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4fdeb0a1ba959661aae002ffdd0a0830 SHA-1: 280b17ed31b58f42ce2fcabe4eb2c81255856545 SHA-256: dfe3543d1fdbbb2b533d447e54a85244564484f1332c68ba62cd2ad93fe8aa44
92 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a website offering a 'free generator' or 'game hack' for Roblox. This is a common lure to trick users into interacting with malicious content. The document also displays a fake CAPTCHA or human verification prompt, further indicating a social engineering attempt to manipulate the user into performing an action that could lead to compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/what-games-on-roblox-give-you-free-robux-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000335a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335A 24416 bytes
SHA-256: 05a566725978b26ccc0257f90d6ab3425f7819571a2f941983af6bb62c117596
font_01_sfnt_off00006b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B95 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 19440 bytes
SHA-256: d075b9cdfa29af0d09f3a3e5cc134cf400d7d34255e3ca0094b6ab529e7e4150

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