Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc44e1c4bd341517…

MALICIOUS

PDF

44.5 KB Created: 2021-05-15 16:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f4779ba9e9aea57f629fa6f247b23783 SHA-1: d71a1d25854429ad2667416e4a64a964d77ea8af SHA-256: cc44e1c4bd341517c94bbc17d185d52e6ab98b1c6b2130e19ed85c0d3fc05dd9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures for game hacks and free generators. The embedded URL, https://netcdn.xyz/app/431946152/watch-videos-for-robux-game-hack, is identified as malicious infrastructure. The document body, though partially corrupted, contains text related to 'Watch Videos For Robux' and the same malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

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 https://netcdn.xyz/app/431946152/watch-videos-for-robux-game-hack In PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.bridalguide.com/sites/default/files/files/how-to-buy-robux-for-free_GM431946152.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_off00004920.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4920 28372 bytes
SHA-256: 5cda6fc1d7707452dfe9deb9a7c7fc6afb98f70f9fd2ad090a35e98cd1cfd5cd
font_01_sfnt_off00008931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8931 19140 bytes
SHA-256: 301f4b72018bde41591ea9383aea6da8578dd4e8b92e993503a568e91431ca36

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