Malicious PDF — malware analysis report

Static analysis result for SHA-256 3338da1daa868380…

MALICIOUS

PDF

43.9 KB Created: 2021-05-14 11:32:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0bc6f2e70d24b2a0a6b768ae5464751b SHA-1: ecd2338b984be053bebc8bae4ee97224d95b3188 SHA-256: 3338da1daa86838069a62e725bb6da3ea57bd2fe05a6c09d8dd2db6f660318db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL https://netcdn.xyz/app/431946152/rbl-gg-free-robux-game-hack is a known malicious redirector. The document body also contains numerous other URLs that likely lead to similar malicious content or further redirection. No scripts were extracted from this sample, but the primary attack pattern is a lure to a malicious website.

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/rbl-gg-free-robux-game-hack In PDF document text
    • http://www.bayrischestaferl.de/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/mcpe-com_GM479516143.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.bayrischestaferl.de/images/how-do-you-get-free-robux-without-paying_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_off00004c4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C4E 26544 bytes
SHA-256: 8aa2f61d4d44fb58141d5f6efcb5a6837c548d3e0631ec6587ab91d0440a3db4
font_01_sfnt_off0000890b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890B 18376 bytes
SHA-256: 36d8e5c8df31ce5774558eb4dff236d908794f1052653b7bf9d7a2310610d2b4

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