Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7fbd8b937a257f…

MALICIOUS

PDF

41.6 KB Created: 2021-05-02 10:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 14a178aa52677112f541311cfc93adcc SHA-1: 41b03fe26e56e678058a9e70317436900a11a742 SHA-256: ea7fbd8b937a257f10f7856f3e4e5a95e9c082f4475ce21448c617ebd4a79c8f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically promoting 'game hacks' and 'free generators' for Roblox. These links are identified as malicious and lead to a known redirector. The document body, though partially corrupted, contains text and URLs consistent with a lure for potentially malicious content or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/como-ser-un-hacker-en-roblox-game-hack In PDF document text
    • http://wattkit.com/images/https-get-free-robux.pdfIn PDF document text
    • http://wattkit.com/images/cheat-codes-for-building-simulator-roblox.pdfIn PDF document text
    • http://wattkit.com/images/how-to-get-free-robux-on-mac-2021.pdfIn PDF document text
    • http://wattkit.com/images/cheats-do-roblox-cs-go.pdfIn PDF document text
    • http://wattkit.com/images/roblox-hack-with-no-human-verification.pdfIn PDF document text
    • http://wattkit.com/images/free-roblox-robux-hack-generator-no-survey-2021.pdfIn PDF document text
    • http://wattkit.com/images/roblox-promo-codes-for-free-stuff.pdfIn PDF document text
    • http://wattkit.com/images/script-hack-robox-robux.pdfIn PDF document text
    • http://wattkit.com/images/how-do-yuo-get-robux-umlimted-free.pdfIn PDF document text
    • http://wattkit.com/images/free-robux-hack-no-human-verification-and-no-survey.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_off00003e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E0D 24508 bytes
SHA-256: 0c444e706b7c726ffe50b2d2f3cfef5c07bc4ae51378c9cff2910715e9b77617
font_01_sfnt_off000075a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A5 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00007f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F56 18628 bytes
SHA-256: f3bb75c8fc766cbad34aa3eec9e9df2495dada5911d876fd9d82629436a61107