Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92f99309ac5d4a9…

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 17:58:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6521e1daeeb103c4a3fbe0337f16fd6c SHA-1: 33b3c3b745335b0ce5f02b7813d70710cdc04d29 SHA-256: b92f99309ac5d4a96289c8eda06c4c7898e1d01e880510d4514881374cf18191
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to known malicious redirectors, disguised as game hacks for Roblox. The primary lure URL is http://netcdn.co/app/431946152/anti-cheat-script-blocker-roblox-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or malware distribution 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/anti-cheat-script-blocker-roblox-game-hack In PDF document text
    • http://www.sscs-uae.com/userfiles/files/bird-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/rogue-roblox-aimbot-cheat_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/pants-free-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/roblox-free-model-scripts_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/flame-gg-earn-robux-free_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/hackcom-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/como-hackear-cuentas-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/how-to-hack-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/free-roblox-cards-numbers_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/roblox-skins-girl-free-download_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/how-to-make-a-costume-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/free-robux-generator-unlimited-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/how-to-hack-roblox-death-zone-glitch_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/cheat-engine-roblox-noclip_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/robux-hacks-code-admin-commands_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/hack-roblox-2021-17-de-junio_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/free-2021-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/cheat-engine-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/jailbreak-roblox-code-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.sscs-uae.com/userfiles/files/roblox-free-robux-promo-codes-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_off000031a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A2 22980 bytes
SHA-256: c34faf6b88d04f4a37797dd2b36e1b7a85a753748ec54e17f9b65b1a6f0329af
font_01_sfnt_off00006554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6554 19224 bytes
SHA-256: 8631373cca0ec5584ca4e0cbe83f972ac31c00023b56e442f23f564394b48fc2