Malicious PDF — malware analysis report

Static analysis result for SHA-256 4467c34eba28af2b…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 16:32:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af1f80d13ab03909d343c99028146574 SHA-1: 84e7bb9459a7b691747f4bfc7f2bd6074d84793d SHA-256: 4467c34eba28af2b1cef27f20353e8e1af3838bf76bdd8b4655c354cbab0653a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and currency. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-no-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

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-no-download-game-hack In PDF document text
    • http://tehergumi.hu/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://tehergumi.hu/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://tehergumi.hu/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://tehergumi.hu/images/free-spin-coin-master-game_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
font_00_sfnt_off00004775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4775 24504 bytes
SHA-256: 2ac8499291aa9611187299af24a6813d0003f853b7c6184588bdd04234802171
font_01_sfnt_off00007fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC9 18824 bytes
SHA-256: a83584a15d83770571e134086905248a9fe783ccc3b424d06d308178a7ec7f42

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