Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ccf420f77a1e19b…

MALICIOUS

PDF

43.1 KB Created: 2021-05-17 14:55:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d6d1812b05dfcd025d922315ade00450 SHA-1: fb9e46391c96c64353a807210ed6fc1b6f18bd5c SHA-256: 7ccf420f77a1e19b3fd5c595845fa4476573455d5031ef6a3258d2f93b42cf79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirectors, specifically promoting 'game hacks' and free in-game currency. The document body and extracted URLs suggest a lure for users seeking cheats or exploits for games like Coin Master and Roblox. The presence of multiple links to redirector infrastructure and other PDF files indicates a campaign to distribute potentially malicious content.

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-free-spin-link-today-download-game-hack In PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/mc-hacks_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/gamehunters-club-coin-master_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_off00004ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB3 25096 bytes
SHA-256: 00a4e6379745b11e796ac8c45f0ce531535684dc5e3c6e744c96b6e1ddd21945
font_01_sfnt_off00008467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8467 18816 bytes
SHA-256: c5a160641c4edab75c60996e0f798f3e883f872898d31e041e46be69cf2ac151

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