Malicious PDF — malware analysis report

Static analysis result for SHA-256 8423fe582778bb6f…

MALICIOUS

PDF

33.4 KB Created: 2021-07-06 06:50:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 801ecbc353a4989d033ad5b4afd307d6 SHA-1: 0237b33ed9475cafa51a75c73ce7f904d4366392 SHA-256: 8423fe582778bb6f048647a39e8e795eaeb89f603eda504c204dfa3409aab363
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises 'Free Robux' and game hacks, indicating a phishing or scam lure. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to a malicious site for further exploitation or credential harvesting. No scripts were extracted, but the overall pattern points to a social engineering attack.

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.tw/app/431946152/free-robux-not-fake-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/como-tener-dinero-infinito-en-meepcity-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-hacks-for-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-printable-roblox-birthday-invitations_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-free-gui_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-account-roblox-obc-2021_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-peoples-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-roblox-gift-cards-nov-2021_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_off00002df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF0 21580 bytes
SHA-256: ee6a6c3ba1c5afceaf982282de1400bc61e383b6932b09415fa520882cbbdd7a
font_01_sfnt_off00005d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5B 18992 bytes
SHA-256: e4ac39d57ff956450bb8dd48df15acc1078399c4d14e18067568ebfa6ae85f6b

Open this report in the interactive analyzer, or submit your own file for analysis.