Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9358dce49b91967…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 02:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 89882a8b590b9a67d55e7c8f35099190 SHA-1: 78d8984a13dfca3b3cc71a2593e67252a54ae8a7 SHA-256: b9358dce49b91967095f79f7ac0ebdf2ed009d18064943f000851d8db1c3e155
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free in-game currency, such as Robux. These links, including one pointing to a known malicious redirector at http://netcdn.co/app/431946152/how-to-buy-robux-for-free-on-roblox-game-hack, are designed to lure users into potentially dangerous sites. The presence of an IP address literal in a URL and the ML classification further indicate malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-buy-robux-for-free-on-roblox-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/roblox-csgo-aimbot-hack_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-mineverse-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/pretty-cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-para-jailbreak-roblox-pc_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-faces-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-account-hacked-and-pin-set_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/redeem-code-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-studio-apk-free-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-tener-ropa-en-roblox-sin-hacks-ni-robux-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-high-school-for-free-to-play_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hacks-download-free-dll_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/changing-your-walkspeed-in-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/gift-card-roblox-free-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hack-with-no-human-verifycation-or-surveys_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_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22112 bytes
SHA-256: d63baf9b6494c502168d1283b4cf1256636c89206870477ab984455b55d1a769
font_01_sfnt_off000060d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D5 19132 bytes
SHA-256: 98c2ef7ce9ac5835ecdf84922c8c9066568cc9a8fb05fe820807657408b0b1c0

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