Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17573f392bbcebd…

MALICIOUS

PDF

43.0 KB Created: 2021-05-20 01:06:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3e58d3307c119a8a0f807e283abcaee7 SHA-1: edb6caedbc2d63f306a16ef7ad50727488eb27db SHA-256: c17573f392bbcebd3b130889a3725ae3af75778e60d11a43336e898f17dd8d0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are flagged as malicious redirectors, leading to websites that promise free Robux or game hacks. The document body and heuristics indicate a lure for users to click these links, likely leading to phishing or malware download sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/431946152/free-robux-website-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-app-for-ios_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_003_off0000498b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498B 25596 bytes
SHA-256: 6cf5db5c7689b1aac58aabe36be7f9e9337df3076cb399822fb3e5fd7fcfafbc
font_01_sfnt_off00008538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8538 18436 bytes
SHA-256: 681a9996b59f8391b7cc91011c49ef4e68754eb5dc3ad8da1029f3e9c8ab03b4

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