Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5aa2b1551f084b0…

MALICIOUS

PDF

32.4 KB Created: 2021-07-21 07:12:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d07257c678c1ab412947fcd1f0e7f638 SHA-1: f2eef7c82ae5624037e7b8636348c764646f4b10 SHA-256: a5aa2b1551f084b03915a2a0de84d80233063e2932d18ef909693eabeb2b250a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as offers for free game currency and hacks. The document body explicitly mentions 'Real Free Robux Codes' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', reinforcing the lure. The embedded URLs are designed to lead users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/real-free-robux-codes-game-hack In PDF document text
    • https://kierowcyhgv.uk/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://kierowcyhgv.uk/images/free-robux-gift-card-codes_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_off00002842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2842 22720 bytes
SHA-256: 7e34cefa00d98a9f881ea700a8ae2d733387b662691d04a930aaf6223ef49842
font_01_sfnt_off00005b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B57 18676 bytes
SHA-256: d997f8dbe5fc9170266e0fe06da81ef1f9b40d7de8e1f17e13013b91ed06a44c

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