Malicious PDF — malware analysis report

Static analysis result for SHA-256 caef86a2038ec19c…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 04:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0157e006c7d499d9e301e0ff73023f14 SHA-1: 7a8a397334aff255f728d9c5b3282872cf69ba56 SHA-256: caef86a2038ec19c9d5a3a53f1ce1dfbcd9d87695e03aba76486fa178e689187
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading what is presented as a game hack. The primary link redirects to malicious infrastructure at 'https://netcdn.xyz/app/431946152/krnl-roblox-game-hack'. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/krnl-roblox-game-hack In PDF document text
    • http://iacfhouston.com/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins-link-whatsapp-group_GM406889139.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_off000049db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DB 26480 bytes
SHA-256: 09499d7d285527fe5a112b178e0e3b8961f414793bdc1a5412d65f634794009b
font_01_sfnt_off000084f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F5 17784 bytes
SHA-256: 7fc5638c4d6a7adf3a00de91436b89ff4a884cee4fe7182ef9800dc1feaad259

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