Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c42dba2ba77171…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 19:08:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 55a6931846b9bec36ea866e664eeb41d SHA-1: c532f36829673ee11bc25e95d4d7af6f93a2371d SHA-256: 82c42dba2ba77171de0998caa436e21a63bd7465a71d012eec94d1ef0c5dfb35
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and domains, masquerading as 'free generators' or 'game hacks' for popular games. The document body and extracted URLs strongly suggest a lure for users seeking in-game currency or items, which is a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to phishing sites or download further malicious 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.tw/app/431946152/free-robux-no-password-game-hack In PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/best-free-roblox-items-exploits_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/code-roblox-robux-free_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/5-roblox-games-that-give-free-items_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/what-is-my-robux-promo-code-for-free_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-do-you-get-free-money-in-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-2021-real_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-game-link_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-sentry-in-all-out-zombies-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-do-you-get-1-million-robux-for-free_GM431946152.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
font_00_sfnt_off00003019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3019 22468 bytes
SHA-256: a79b97b670a28fa203585bd1a711ff9881bbf55607fde155a46644791e484f5c
font_01_sfnt_off00006249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 19208 bytes
SHA-256: 6b3d0efb3debf488fe81ea92b60c01ccbae5249fd0a29fdced25ee5be01c6081

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