Malicious PDF — malware analysis report

Static analysis result for SHA-256 38058af5adfb4b2b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 08:44:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87ea18c5372e17d441085110bacacfc3 SHA-1: 2eec6d505d58836a7cfc269f367069fa3b838406 SHA-256: 38058af5adfb4b2b0f82cc81695cf64aa8201040e9fa92ae38c74a04f94f8c86
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains embedded URLs and a call-to-action phrase, strongly suggesting a lure for users to click on links related to game cheats and free currency. The ML classifier also flagged this PDF as malicious with high confidence. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-for-iphone-game-hack, is likely the intended destination for this phishing 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/406889139/coin-master-free-spins-for-iphone-game-hack In PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/roblox-area-14-hacking-script-pastebin_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-cheats-tablet_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-mod-menu-hack-exploit_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/descargar-roblox-hackeado-adopt-me-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/software-for-cheat-engin-66-to-not-make-roblox-carsh_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_off00003261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3261 22464 bytes
SHA-256: 171ecd9c06ac7db38fed1d6de300893bfa1221aaedd3599994d0970316188d07
font_01_sfnt_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 18340 bytes
SHA-256: e2135d2cea60edb82cb3f417b214bee0553b482f1ade3295b8c3e9eb6450f30f

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