Malicious PDF — malware analysis report

Static analysis result for SHA-256 e292799b0574e595…

MALICIOUS

PDF

33.1 KB Created: 2021-07-20 01:58:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 16715d87438262767a385738ac5e9ba5 SHA-1: e640e9b334e7d04514cebef5b3306dc4d480bfe1 SHA-256: e292799b0574e595caf04f9cfaf10b7623a854efda7a25b1154ec73596612c59
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The document body explicitly mentions 'free Robux' and 'game hack', and contains a call-to-action to access a generator. The embedded URL http://netcdn.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack is a primary indicator of malicious intent, likely serving as a downloader or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/how-to-get-free-robux-without-verification-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-pocket-edition-free-download_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
font_00_sfnt_off00002ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE5 22288 bytes
SHA-256: 6f1f90995e1c495ee657968c2cc54c275479bb4b5481bb2d0366f8a6322c5bc8
font_01_sfnt_off00005c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C29 19312 bytes
SHA-256: eb1c0975d0c71be315e6abe7b5e51258c56129465615f62f4b55ea72fa58727d

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