Malicious PDF — malware analysis report

Static analysis result for SHA-256 f455c59dde9ac189…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 05:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1cdf86edbc712f53755e3af32ebb3c58 SHA-1: 618a480f72af691629703be3c999e0e380e3f78a SHA-256: f455c59dde9ac1891bcff9ee49ae6152cdc897c56e6882138a25d4ced6c15b5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to websites promoting "free generators" and "game hacks", a common lure for scams or further malware delivery. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious redirection workflow.

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/406889139/daily-free-spin-link-for-coin-master-game-hack In PDF document text
    • http://interokna-kuban.ru/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://interokna-kuban.ru/images/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://interokna-kuban.ru/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://interokna-kuban.ru/images/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://interokna-kuban.ru/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://interokna-kuban.ru/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://interokna-kuban.ru/images/coin-master-card-collection-link_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_off00004cb8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CB8 24840 bytes
SHA-256: ef2e426db00c081cf1df73e18f5e7e1509848189dcbfb9f337c0def9e0ec45fa
font_01_sfnt_off0000856c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 18476 bytes
SHA-256: a1e2d053ddd827b51a873b4daf81e699df0b3bac0bfbdaf6be5e73db52a20702

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