Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97e94a38e89b52c…

MALICIOUS

PDF

35.0 KB Created: 2021-06-17 20:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 19209b06d8dbb2f13ace02d0c9432ec4 SHA-1: 7b9face6cc03ca78c6bdf7ab9b40df9cc43327ec SHA-256: c97e94a38e89b52ca24eda5cb54e24dd3d74007b36572ab13b30d3b8796952b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically targeting users interested in game hacks and free currency for games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a lure to trick users into clicking through to potentially malicious websites. The presence of PDF-specific heuristics for malicious redirects and game hack lures indicates a clear intent to exploit user interest for malicious purposes.

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/roblox-how-to-get-obc-for-free-game-hack In PDF document text
    • http://medinup.pt/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-prison-escape-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/hacks-for-no-scope-sniping-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-2-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3094 23316 bytes
SHA-256: 2672c8606d4ed231353abd0aedf24bbb4de3435481bfb04b140911619b79e070
font_01_sfnt_off000064de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 18732 bytes
SHA-256: f9058bcc62cbf4b6c0f53d0b569f7f433ab5f9fed08c97873db92674e20d821a

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