Malicious PDF — malware analysis report

Static analysis result for SHA-256 4795d5925d56c3b0…

MALICIOUS

PDF

33.8 KB Created: 2021-06-22 20:19:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3f3c1f7af7a6ff3ce8acf8a801864e36 SHA-1: 6b5814dc00209293466989a2971dfa5f6769ea9d SHA-256: 4795d5925d56c3b07b95fce7bfd06bad0a35b9081f8c30f48fc8632538c48aea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free Robux' to lure victims. The document body and embedded URLs confirm this lure, directing users to sites like http://netcdn.co/app/431946152/how-to-hack-roblox-for-robux-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to malicious infrastructure.

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/how-to-hack-roblox-for-robux-2021-game-hack In PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/tiktok-free-names_GM835599320.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/arbx-club-free-robux_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/robux-hack-whith-easy-human-verifacation_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/roblox-sniper-update-hacks_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/gameresources-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/old-roblox-logo-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/pokemon-go-free-7-days_GM1094591345.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-robux-please-join_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.new-racoba.com/uploaded_files/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE8 21716 bytes
SHA-256: 3f252f3eaf6d92fdf0b64e2ff743e3d9ba5946c0e54d87fcf0e16c960a954e4d
font_01_sfnt_off00005d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7A 19528 bytes
SHA-256: 7c3a2f60f5e5baa487ca42c3c93d51da1f2c0b6e1c89830aeaa44680603f888e

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