Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fa84fba374f6e0…

MALICIOUS

PDF

33.6 KB Created: 2021-06-21 17:28:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4978b381d92f125526c65a186afadf5c SHA-1: a8b2f80dcb64f9bbcd289caf1bc7e5029f7c726b SHA-256: d7fa84fba374f6e04196b890f2b674bb50ca5f2aae76f544cadaefebe578a1e0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as game hacks for popular titles like Roblox and Minecraft. The document body explicitly mentions 'Roblox Pastebin Robux Hack' and includes the malicious URL, indicating a phishing or scam attempt to lure users to potentially malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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 http://netcdn.co/app/431946152/roblox-pastebin-robux-hack-game-hack In PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/critical-strike-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/hacks-of-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/paste-bin-dab-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/youtube-how-to-get-free-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.unicor.co.th/assets/editoruploads/files/free-links-for-coin-master_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_off00002deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEB 21836 bytes
SHA-256: 37334b91bee4fe6beb5c0c50f4693e28029b02768fa57ecfa0207271ec8cdca0
font_01_sfnt_off00005dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD 19176 bytes
SHA-256: 3ea50978c2d2bc0bb1fc6f59fbd431d310565f7622df61feb0b84760ff4ac611

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