Malicious PDF — malware analysis report

Static analysis result for SHA-256 4918ac387b9e51d3…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 17:44:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 51378a83ca9e4982e83cd832740aa13b SHA-1: bd9dd496cbec5bf9ccd5d0996e36a3af3d1804b7 SHA-256: 4918ac387b9e51d3924a35612049d52239cd9a0426b054d7f48718be6f654c5a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and sites offering game hacks and cheats, indicating a phishing or scam attempt. The embedded URLs, such as http://netcdn.co/app/431946152/roblox-black-pants-free-game-hack, are designed to lure users into downloading potentially malicious files or visiting further compromised sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering attack.

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/roblox-black-pants-free-game-hack In PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-lua-executor-free_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-clone-tycoon-v-12-cheats_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/freer-tiktok_GM835599320.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/get-free-spins-on-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/como-hackear-roblox-con-cheat-engine-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-with-no-human-verification_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000332b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332B 22272 bytes
SHA-256: 75b1a60587f4f7be06581e2994390125f97ef255f3ff609c3c560f9edde5a30b
font_01_sfnt_off000064d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D9 19076 bytes
SHA-256: 01599dc63a1d58b20c79959f9794923c7a1ba10742440a338acdea044d235f58

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