Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ede193cf05783b7…

MALICIOUS

PDF

35.4 KB Created: 2021-05-20 18:35:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c57c70338f1c05157a4a2cc016a189a9 SHA-1: 3bb683c73b555bf74597ee726fa270c29a46bbb3 SHA-256: 5ede193cf05783b70db72d0db02a0186ef849b69a2f92e2b81f11ee152e58345
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action button designed to trick users into believing they can obtain free game-related items. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/479516143/free-minecraft-account-game-hack In PDF document text
    • https://www.manmed.info:443/images/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/robux-earner_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/i-want-to-grow-my-account-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/wurst-minecraft_GM479516143.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
stream_002_off000032d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D1 24584 bytes
SHA-256: 21f3e3af43f4da853f4c9d891b361b5e8fe1a4d5100f5ee21793bb3186cec303
font_01_sfnt_off00006a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A51 17848 bytes
SHA-256: 6e6a79a2e8d921ce4110ee7bea64574f9639f41d67ba7d7747bc91dcd849eff6

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