Malicious PDF — malware analysis report

Static analysis result for SHA-256 88cce34218fb23f5…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 00:07:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 21a037130fa090d0ad7326f8c8748040 SHA-1: cd70499ebe0a526ebe9ae6ccb721268c3e92ab7b SHA-256: 88cce34218fb23f5a70d1793ca3eb52f58f7371d5f9f1e382022013a683bbecb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising "game hacks" and "free generators". The ML classifier strongly flagged this PDF as malicious. The presence of a visual download button lure further supports a deceptive workflow. The primary attack pattern involves tricking users into clicking these links, likely leading to phishing or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/static-moonactive-net-game-hack In PDF document text
    • http://paro.net.ua/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/free-roblox-gfx_GM431946152.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_003_off00004866.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4866 25368 bytes
SHA-256: 8b08754b241e899ceecd4564b0b93f2cbbc8f479d63c55e45a197e13afae5187
font_01_sfnt_off000082b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B3 17660 bytes
SHA-256: 6b7ab008261f630dc22e15b5ef3c221448b4794aa8c3d363ebd414377ccf7e51

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