Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d46b3b3b1e857dd…

MALICIOUS

PDF

39.7 KB Created: 2021-04-29 11:04:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2fa84a95d786803c3c4c5c5b72554856 SHA-1: 5364c393eeab5bd2e53e3ae5b9f6d9ed464ce589 SHA-256: 3d46b3b3b1e857dd124c3733a5a68a82e400ba38216783c656097aa8be991118
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' or 'game hacks'. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-no-survey-xbox-one-game-hack. This indicates a social engineering tactic to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/free-robux-no-survey-xbox-one-game-hack In PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-report-hacker.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-full-throttle-hack.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/are-free-robux-streams-legit.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-money-hack-cheat-engine-63.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-free-purple-hat.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-robux-with-console.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/boku-no-roblox-remastered-hack-chose-quirks.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-shirt-template-free.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/free-decals-for-roblox-work-at-a.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-robux-hack-download-pc.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_003_off00004129.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4129 24456 bytes
SHA-256: d718b49843821236ce92ad7ab3da1ac006c0b11b17f7159ed65294f704ea88e6
font_01_sfnt_off0000795c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795C 18308 bytes
SHA-256: 5d16123b878a06579fd4fc08d6b29643b26f3b99fd7f62df1b76af10307baede