Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bf3af15f5ff11aa…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 15:40:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c887e607732bc57e04a2fe163819882 SHA-1: 6c544f240dd799048337ea4728769bf59c02bd03 SHA-256: 6bf3af15f5ff11aa286b4f5297591c4fc67863bd38381e0dfdbc386abcae2d53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, masquerading as a 'free generator' or 'game hack'. The document body explicitly mentions 'Free Robux Promo Codes' and 'game hack', reinforcing the lure. The primary URL, http://netcdn.co/app/431946152/free-robux-promo-codes-december-2021-game-hack, is identified as a malicious redirector designed to lead users to potentially harmful content. No scripts were extracted, but the embedded URLs and the lure text strongly indicate a phishing or scam attempt.

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-robux-promo-codes-december-2021-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/freespinandcoin_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/wear-trash-gang-merch-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-other-peoples-invertorys-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/scripts-hack-for-roblox-r2da_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-how-to-get-ninja-animation-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-give-away-codes-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/cheats-for-roblox-unlimited-robux_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_off00002e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E92 21704 bytes
SHA-256: 0121688cbd39a89db2caba2d2fca0fc56308cc9f953473de8cb19001962e965b
font_01_sfnt_off00005e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4F 19872 bytes
SHA-256: 1b024e0b70ce86e4ac4503d045dcfbd472bdce423ef6603ef7213d76b6d15c1e