Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c83ff6c5a83f81b…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 09:14:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a295c1b484b36468ea58c71a6f26ae4c SHA-1: 66523febe066e08f9bc2a371d6cbc27a89a64eb3 SHA-256: 2c83ff6c5a83f81b8515e144cb0766204da73068058b868ca6b58ea5e98635a1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "free generator / game hack" for Roblox. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/roblox-com-r-game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-coin-app_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/games-for-robux_GM431946152.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
stream_003_off000047db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DB 26028 bytes
SHA-256: 3aefa0085f91575a596b5b34c036a516ae8e3c9477f909cf1762335826c37c3d
font_01_sfnt_off000083df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DF 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8E 18044 bytes
SHA-256: 1bac474c9f29c65064f9d5134d3fb8963ac85574f5d54b941e913c8d0115a2c9

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