Malicious PDF — malware analysis report

Static analysis result for SHA-256 65dcf534e9db1b08…

MALICIOUS

PDF

44.1 KB Created: 2021-06-07 10:15:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6c7f0f876334ca78b3cd9cd365ed38be SHA-1: af0419e743caa82eec5c2651566e0d7ca5fd0c63 SHA-256: 65dcf534e9db1b08a356da6c5793d33944d2feeac688c5116df6d9ab764f0383
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically identified as malicious. The document body and heuristics indicate a lure related to 'game hacks' or 'free items', designed to entice users to click. The primary link directs to a known malicious redirector infrastructure, suggesting the intent is to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-how-to-get-free-items-game-hack In PDF document text
    • http://medinup.pt/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/pokemon-go-free-or-shadow-mewtwo_GM1094591345.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-pal-hair-free_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-source_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_004_off00004eed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EED 25564 bytes
SHA-256: 808c37fd29a1349f43793c26a577435d83443865c68b184ab34380dfbc2129f9
font_01_sfnt_off00008952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8952 18476 bytes
SHA-256: cebaa62d40eaf68d37ab18dd4066b47984ae6e64ec798b9dda764f54cd27f78b

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