Malicious PDF — malware analysis report

Static analysis result for SHA-256 630987c1ec0d6eda…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 11:21:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 57739298cd588fdfb41f5557e0e872a8 SHA-1: 338e313ee65c6075824c9ff075bca86740c24ee6 SHA-256: 630987c1ec0d6edac1c8d7ae30ca76adc7d2ec6bcf60e5ad6f80a4f40b6f76f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, masquerading as game hacks and free generators. The primary lure appears to be related to popular online games, aiming to trick users into visiting compromised sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or malware distribution attempt.

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.tw/app/479516143/cool-free-minecraft-skins-game-hack In PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/christmas-tycoon-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/why-do-my-roblox-hacks-crash_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-hack-ingame_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-roblox-inspect_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-hack-no-human-verification-and-no-download_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/roblox-weapon-simolator-hack_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
font_00_sfnt_off00002fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC3 21828 bytes
SHA-256: 8ad0f806048ef0ad4aeb601d879e4f71fb608d3c95da84baaed20c28d1ef99ff
font_01_sfnt_off00005fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 18240 bytes
SHA-256: b4c51c0f4cfa542f56e849e24631c283cf0f0c701d0556af4dc462a34ac74f1d

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