Malicious PDF — malware analysis report

Static analysis result for SHA-256 869b1d0ef96a1248…

MALICIOUS

PDF

34.3 KB Created: 2021-07-02 05:22:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b0eff9802ba44fd4d01f8b06ed4c95fb SHA-1: a1e30d4e2c67f78119042ac5ab1fd6644c2744e7 SHA-256: 869b1d0ef96a1248d560973e7abb7b529d9802f48039ef3c6b887c7b371a6f89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as lures for game hacks and free in-game currency. The primary redirector URL is http://netcdn.co/app/431946152/how-to-have-hacking-tool-in-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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-have-hacking-tool-in-roblox-game-hack In PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-free-clothes-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/helpcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/face-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-unban-hack_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/a-vide-on-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-scammers-to-troll_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-new-hack-exploit-2021-still-works_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-mobile-hacks-4-free-com_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/pain-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.mierepair.com/uploaded_files/userfiles/files/minecraft-wurst-client_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_off00003187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3187 21560 bytes
SHA-256: 522679ad35ec284ea453d94b27bf7fe36de8422a59e340b0083997fc7c20238b
font_01_sfnt_off000060dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 19052 bytes
SHA-256: 3cda72802934b82495bd1cb14eac7a6efe23ecd5b9d9f910066a929d56cf602e

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