Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb0a99754932594…

MALICIOUS

PDF

43.5 KB Created: 2021-05-13 07:05:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1feb5e46d13b3f51c39b0dbe000ba2f7 SHA-1: 61abeb8470941a63bf0c8f51086246676984be2f SHA-256: cbb0a9975493259421e23b484b0902501bafa34d4fc3750b49c55fbfb82f24e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The document body, though partially corrupted, contains references to free Robux and game hacks, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent.

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/431946152/is-there-any-way-to-get-free-robux-game-hack In PDF document text
    • http://xenonsvjetla.com/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/hack-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/how-to-get-free-spins-in-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_off00004c06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C06 25300 bytes
SHA-256: 0091842bec156aa0d442d7398d6557db3ab475d00f95dd31af27c27d9977a204
font_01_sfnt_off00008608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8608 18892 bytes
SHA-256: d4b621edf5ac5f073c5a65dd804db4f1f2ad13c123c1b5ace541ce5f5c284f58

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