Malicious PDF — malware analysis report

Static analysis result for SHA-256 460d8ef81263bd08…

MALICIOUS

PDF

42.6 KB Created: 2021-05-20 21:36:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bffdd0acf3b2b54d7856dcfeb7bf3cbc SHA-1: d5824770c0880b05f396faedef54bb19a8c2b26e SHA-256: 460d8ef81263bd08c79acae20e5bd2193390f2d1ebac6373d8d12eaa24a1568e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as generators for popular games. The document body explicitly mentions 'Free Roblox Scripts' and 'Roblox Generator', reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9506

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/431946152/free-roblox-scripts-game-hack In PDF document text
    • http://unilin21.ru/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://unilin21.ru/images/coin-master-mod-apk_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_off00002f0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F0C 39260 bytes
SHA-256: 36fc52172a91b02cf198035ae7d094796461ac20116b6a205e2e52c953f3e575
font_01_sfnt_off00008572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 18348 bytes
SHA-256: a05e51cd539dd6b301b45f7fb58cd288955602bf3cc953f1dc3d411cb11e51a1

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