Malicious PDF — malware analysis report

Static analysis result for SHA-256 11383e0ef8e7db5d…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 02:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb2882e352f70afdd87dbff6471d5e2a SHA-1: 27014bfc3e7bd429cc8893e75ddf2fd56dd10ea1 SHA-256: 11383e0ef8e7db5de0be08e3dad7756ab48c357ab6b07f4d0b8a2f42b1de7a53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting a 'Coin Master Free Spins Hack'. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the nature of the lures suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/coin-master-free-spins-hack-2021-game-hack In PDF document text
    • http://medinup.pt/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-rape_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-software-download_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-monster_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-18_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_off00004937.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4937 24780 bytes
SHA-256: 26c8e94e6713d1b482ad8fb3da8fce8e079b73f1393cce3e2666392ed071a971
font_01_sfnt_off00008171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8171 18456 bytes
SHA-256: a585848d53eaea1bda4e1de9ee00cb9d2c4270f04f2766c3858066f184342be0

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