Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9da1d128834cf0…

MALICIOUS

PDF

41.5 KB Created: 2021-05-12 23:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c46e45b35e4167262b690f376cd73609 SHA-1: 023cebb4fda69dedba798f5c6c52b1c9cab2dcdf SHA-256: df9da1d128834cf0385335613545843e1554830c7c4f6ac3155536cf1564d3a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs advertising game cheats and hacks, suggesting a lure to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a suspicious nature. While no scripts were directly extracted, the document's structure and embedded links indicate an attempt to trick users into downloading potentially harmful files.

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-daily-spins-game-hack In PDF document text
    • http://christiansymbolkits.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/robux-win_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-g_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

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 24332 bytes
SHA-256: 32b005c096e454e1a5ac9e0e14afb4b0418991ddad58a0e4e5f3c66992754f08
font_01_sfnt_off00008016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8016 18144 bytes
SHA-256: f08757dcdc9134d61ed297cf9667007aad3529640848292aa1286a565aeddd1e

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