Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ce659ea8155394…

MALICIOUS

PDF

32.2 KB Created: 2021-07-19 04:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f2f830e88aa5eb11063e0d19e567cb6b SHA-1: 117e0a0457e00d694b53d8c0d32640b1f224ac4a SHA-256: 72ce659ea8155394ba6716789baf445778a5c44e802182043098ca5e9c962cd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as 'free generators' or 'game hacks' to entice users. The primary lure URL is http://netcdn.tw/app/431946152/free-robux-legit-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely leading to further malware or phishing content.

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/free-robux-legit-game-hack In PDF document text
    • http://dialine.cz/images/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://dialine.cz/images/freer-pro-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://dialine.cz/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://dialine.cz/images/how-to-hack-coin-master_GM406889139.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_off00002699.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2699 23092 bytes
SHA-256: 65b99d6c2ed75b427db50b56ef7b16ffec3f2f7976c1f5cda6c8d795b80afee9
font_01_sfnt_off00005a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8A 18712 bytes
SHA-256: 0a3bb92d146b122749d57d36755b29a560cd1c032c54bb08c637f56f67b3a8e8

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