Malicious PDF — malware analysis report

Static analysis result for SHA-256 745238a934653ee8…

MALICIOUS

PDF

47.6 KB Created: 2021-06-13 22:53:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 86364bbdb01fd089abcae938aa757440 SHA-1: 8f172a30d54ebedbe543f3ebdfab25fad7cf3f23 SHA-256: 745238a934653ee81e20d3603140201ade3662ede2c9a113779df3bdc90c7c2f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites, including a known malicious redirector, that are disguised as download opportunities for game cheats and hacks. The presence of a visual download button further supports the lure. These links likely lead to the download and execution of malicious payloads, potentially exploiting vulnerabilities in the user's browser or system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/download-cheat-for-roblox-counter-blox-game-hack In PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/cheats-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/774-roblox-hack_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/tiktok-free-100-fans_GM835599320.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-game-for-roblox_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/app-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA8 28140 bytes
SHA-256: 8636058f45a89a8328cb4ed95cdebe088baa4ee0e78982aaeaa8e6a1d33ce250
font_01_sfnt_off00008b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B85 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off0000952b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x952B 19092 bytes
SHA-256: 3b21c2e3b4983ac425c07be43dd3b8f146382fd85b5683687da3000347a31ad8

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