Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf725cf8b4ef04e9…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 16:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 376ab5c9534dc698f9166a8829feabb4 SHA-1: 4e132c787e16616aea85bdba1c51032499f474b5 SHA-256: cf725cf8b4ef04e9ae9c618211cc3352659d4dc3f4ffef83b8633769a003c3ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hack generators. The primary lure URL is https://netcdn.xyz/app/406889139/hack-coin-master-game-download-game-hack, which is associated with malicious activity. The document body and embedded artifacts do not contain executable scripts, but the presence of multiple malicious links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/hack-coin-master-game-download-game-hack In PDF document text
    • http://www.nielsen2u.dk/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.nielsen2u.dk/images/robux-com-roblox_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_off000047e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E1 27120 bytes
SHA-256: 8413402a66d1c11df5d3c34048a3dfafaf2dc5bd00117ad7aa86081b9b62ed04
font_01_sfnt_off000085c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C1 18556 bytes
SHA-256: aaade648ef56f1f9167d0db62f5c53722f102658163b7711b8d17774315d1610

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