Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bf8faeae2513c8…

MALICIOUS

PDF

37.4 KB Created: 2021-05-24 20:05:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c2f1d533f4b99d487475af80e3cdd1d SHA-1: 76ea9d613574ecfd063960fa05f7fdd726a7b154 SHA-256: 64bf8faeae2513c82361835482f25e2c8845419f0cfc4ad36d680e7bc09ee9c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of 'Free Robux Codes 2021' and 'game hacks' to entice users. It contains multiple embedded URLs that redirect to malicious infrastructure, including other PDFs hosted on the same domain, designed to further the malicious workflow. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-codes-2021-game-hack In PDF document text
    • https://marielyst-grundejerforening.dk/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://marielyst-grundejerforening.dk/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://marielyst-grundejerforening.dk/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://marielyst-grundejerforening.dk/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://marielyst-grundejerforening.dk/images/coin-master-attack-madness-hack_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_off000032b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B1 27380 bytes
SHA-256: 0d2b8948b3cfec9085a8f3f855b6a1d2a83142820432c7c5c807825413732c2e
font_01_sfnt_off00006fbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBC 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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