Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4501ef8e4a53685…

MALICIOUS

PDF

43.3 KB Created: 2021-06-10 13:58:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: faa7d9b9e5866ad1ea5fdce9fd1f6076 SHA-1: 6a12baa07de8863f04f62e43516bc0a9211f80f8 SHA-256: d4501ef8e4a53685a01cbe88f910f92e3f6af66799f07ea772eec3a364e8ab89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a known malicious URL. The document body, though partially corrupted, also contains references to game hacks and the malicious URL. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document, likely intended to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-broken-bones-iv-hack-game-hack In PDF document text
    • http://sd-olimp.hr/files/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/wurst-download_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-robux-with-no-verification_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_004_off00004d77.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D77 24736 bytes
SHA-256: 513ea3c8bb590bd6f69486146b1413ee79012e0cbae508b7d00be3b4d4807edc
font_01_sfnt_off00008667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8667 18296 bytes
SHA-256: 7653263be7370f3654cf9934c3aa49bef774dc451d84b4bf48c77f5942e68e42

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