Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3055849f2b1d4c…

MALICIOUS

PDF

42.6 KB Created: 2021-05-17 02:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ae2cfc3c95f963513849b0305ffa2a9f SHA-1: 782211edc657162b0fb0d370dee4436e48afc7b5 SHA-256: bb3055849f2b1d4c9b00fa7e100593d3df19a74d563994a53b6ea8a63cc3c564
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further stages of attack, such as malware downloads or phishing pages.

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/431946152/free-robux-exe-game-hack In PDF document text
    • http://casabea.de/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/spin-coin_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/i-want-robux_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/daily-free-spins_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_off00004881.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4881 26648 bytes
SHA-256: fc92e139a6a57bcdb00d179079d5399cf0ba48ad433d30f8fc31fabbe299bb83
font_01_sfnt_off000084dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DD 18012 bytes
SHA-256: 1e3fda203f08fe42ab00f6cef97e605bb68f7e374108f28afe3c353055d0c9d6

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