Malicious PDF — malware analysis report

Static analysis result for SHA-256 628ed548d756790c…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 16:15:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 863d94b818db2f793b71b136af25bdb4 SHA-1: 14746c4555c8cec08a18adc9eef6e28b5f4bfab1 SHA-256: 628ed548d756790c1884acf4634c54fcba049ea39cdabd7f6891f62b77e58e1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free Robux' and 'game hacks'. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the embedded URLs and the nature of the lure suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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-human-verification-generator-game-hack In PDF document text
    • http://sebastiaanshoeve.nl/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/coun-master_GM406889139.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://sebastiaanshoeve.nl/images/free-robux-com_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_off00004c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C54 25940 bytes
SHA-256: 0cdb4010740ab241935125554774a9025f9160bf39a6099cab40aa575533d3f2
font_01_sfnt_off00008891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8891 18860 bytes
SHA-256: d7f1bf4664d5c073c741d68610eb5dcf28a8fd63084b2bf56aee4ef09f8af4a0

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