Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fd298ea042aa00…

MALICIOUS

PDF

34.0 KB Created: 2021-07-19 09:25:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e794869ec2376ebf4ecfd62a277729a5 SHA-1: d1d52cae1b96805ccb524101c93fcdb07ae8448d SHA-256: 28fd298ea042aa00f2754c130bcaeba4bcbd9b40e79a62971ee5429af6c793d5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free in-game currency and hacks for popular games like Roblox and Minecraft. The document body explicitly mentions 'Roblox Promo Codes Free Robux' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a phishing or scam attempt. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/431946152/roblox-promo-codes-free-robux-game-hack In PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://xn--80adcduozbpo4eve.xn--p1ai/images/free-tiktok-likes-no-human-verification-or-download_GM835599320.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_off00002ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC4 22556 bytes
SHA-256: 3ca2de4b763e05bc86c38e51f0243a1b254f8c102958072598243b59637d8350
font_01_sfnt_off00006142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 18864 bytes
SHA-256: 73558376041902df4a5f42d46c737a963dd25c508dd16b48894d82ece4032a5e

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