Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c86190f5b7c810…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 20:33:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29cfe0006a63e4872a24f84a059976e8 SHA-1: 839a05a76d7c6adbf696dfa573a0bdff8867b71b SHA-256: 67c86190f5b7c8108d8f4225b2e5a7692d4b9d6f77f01aa22ab8568670385000
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with techniques used to deliver further malicious content or scams.

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/406889139/coin-master-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • http://gaec.cl/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-com_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
stream_003_off000048e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E0 23880 bytes
SHA-256: 0947c8d4d07802bd63a036be65f976ac8dfd9b854c90294eed6dfe3999923079
font_01_sfnt_off00007f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F72 18644 bytes
SHA-256: 4144dbe1534d0325d37e4c6129895ddb34a2bc26123e242025982d4ceef1bd2b

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