Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f3a98cd957e735…

MALICIOUS

PDF

45.3 KB Created: 2021-05-17 22:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ebb9011d884a0a820c7176a7a4e1167 SHA-1: a61979c53cf6cecc574355ef27800acb6cdf50bc SHA-256: 28f3a98cd957e7356ba1aeefb4e66628e4db1f4a8597dc8ba61bda142f01876a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising game hacks and generators for popular games like Roblox and Minecraft. The document body, though partially corrupted, contains text and URLs consistent with a phishing or scam lure. The primary attack pattern involves tricking users into visiting these malicious sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/how-to-use-scripts-in-roblox-hack-game-hack In PDF document text
    • http://webstan.be/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://webstan.be/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://webstan.be/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://webstan.be/images/free-roblox-followers-generator-2021_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
font_00_sfnt_off0000458f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x458F 31132 bytes
SHA-256: 0bab774eb1799ac64e7df1722bf782486ba36fe64f0f76612f4cbf99a72198f4
font_01_sfnt_off00008d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D01 18932 bytes
SHA-256: fce9e652f89a1af62f774ff2b7937cf54d78de2903c3939778e1916a8682391a

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