Malicious PDF — malware analysis report

Static analysis result for SHA-256 d111671dc86edc8c…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 05:51:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9fec82d435f23d549e6e0d8f40763b27 SHA-1: 613cbf792ae2b20e576fbe119dfe6b2005d3b296 SHA-256: d111671dc86edc8cc68f754d8096373cb6572718d61e9251037bc6dd63aff958
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to 'Free Roblox Audio Sounds Songs' and a direct download URL, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and an external URI was identified, suggesting the document is designed to redirect users to a potentially harmful site. No scripts were extracted, but the presence of embedded URLs and the ML detection point to a malicious intent.

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/free-roblox-audio-sounds-songs-game-hack In PDF document text
    • https://opac.umrah.ac.id/repository/get-robux-com_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robotinc-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-mad-paintball-2_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-do-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-source-dll_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-font-that-looks-like-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-girl-faces-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rbx-claim_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.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_off000031ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31ED 22264 bytes
SHA-256: cf778f7410530cfb63dd3422db97424916282a95f588e2a20d0951548f48f549
font_01_sfnt_off0000633b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633B 19084 bytes
SHA-256: 1c650737dde14ffd517dbc4445e956705ed95be438eb3ce76e2afc62f2e1dcad

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