Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd761d84250d5b32…

MALICIOUS

PDF

35.5 KB Created: 2021-06-27 00:23:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7fe19400c948e451cbae6d856e416451 SHA-1: bee6ef78af7c1d35d547478922a9f5b427c08ce8 SHA-256: cd761d84250d5b3208cd1d9ed9d864ca2b2c67e96814acaf5502a26388008abb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game currency and hacks, directing users to a known malicious redirector. The embedded URLs and document body content strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-today-domino-game-hack In PDF document text
    • https://kldcardio.ru/images/roblox-building-simulator-hack_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/cheat-engine-cheats-roblox-2021_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://kldcardio.ru/images/tshirt-hacker-roblox-png_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/script-executor-free-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-rixty-code-hack-march-2021-updated_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/super-power-training-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-hack-no-human-verification-2021-and-no-survey_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://kldcardio.ru/images/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-hack-on-roblox-rap-battles_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/roblox-hack-how-to-get-everything-free-on-catalog_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-real-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-build-sims-4-roblox_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://kldcardio.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.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
font_00_sfnt_off00003130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3130 22668 bytes
SHA-256: d64cc76a7c6adaa14ad985520ecc25794755df9c50de7503cfd42cd4b7e55f0d
font_01_sfnt_off000063fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 19616 bytes
SHA-256: 6c31a4cbcbb7821b78dab35af74206fc0aecec488590028e32dc204e6f08e7d2

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