Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ddeb6779a46645…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 19:15:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8d44368cfefe0e8cd9a2ebada5fad0cb SHA-1: 387937829dfb521cb4e7d91dc0ea8d8615b5022c SHA-256: b9ddeb6779a46645e419b3abb573a268bf88c28d8bda2d9413d11bdfa90cff6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The primary link, http://netcdn.co/app/431946152/how-to-get-robux-without-getting-hacked-game-hack, is identified as a malicious redirector. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-robux-without-getting-hacked-game-hack In PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-dump-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-roblox-shirts-2021-deviantart_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/robuxian-tutorials-free-robux-code-generator_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/roblox-hack-robux-and-tix-cheat-tool-youtube_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/roblox-prison-life-glitches-and-hacks_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/roblox-twisted-murderer-free-credits-givaway_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000319e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319E 22240 bytes
SHA-256: d23998dfc1235e5d0aa9f62fd8036dc823c96e9ff03b73e554874e615a211944
font_01_sfnt_off0000630c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 19648 bytes
SHA-256: 0ff8bf3f84e4ed08dbbb1e98d8b5c16d0243add2e34f9fe4114cfa2ce1602c58

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