Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1fda5b3c494199…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 08:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ae57a84e0bb8a76ba9c11e9e91c5ed6 SHA-1: 7c485727c269aded9b278dad3b1d1bbbf707b3e3 SHA-256: 4e1fda5b3c49419949efd3f6dd05b573ac4fe0ca6e2291e2830712cdccaee092
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links pointing to known malicious redirector infrastructure, specifically advertising game hacks and generators. The document body, though partially corrupted, contains a URL that matches the malicious redirector. This suggests the primary goal is to redirect users to potentially harmful websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/free-spin-hack-coin-master-2021-game-hack In PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/robux-now_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/50-000-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bf6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BF6 24612 bytes
SHA-256: 5578b7278116d7a7dce1f643bba294c7f3ebc83c146276445014c0182fd2465b
font_01_sfnt_off00008496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 2880 bytes
SHA-256: 29ffac6ae2c225ad742d302df2deaca7764d0abb58a6f2c81d3137a4f416ba07
font_02_sfnt_off00008e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E85 18456 bytes
SHA-256: f06c00d52fdbfeb3859167a0a2229be9ce2cdc54db22dbc1e88046af3d45da49

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