Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d923fd2aee9914…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 21:05:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aab70c6bda528055ab9466286318ebf1 SHA-1: 77faaa3a06ae601a2d56c9efa8301c7f0f510ad1 SHA-256: 98d923fd2aee9914125d052e9022d6c6a4e0b91bfc8487d2e3b2db4bc271ed93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure for game cheats and free currency, directing users to a known malicious redirector. The document body contains obfuscated text and multiple URLs that appear to be part of a phishing or scam campaign. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-tiradas-gratis-game-hack, which is linked to by several other embedded URLs. No scripts were extracted from this sample, but the document structure and embedded links strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-tiradas-gratis-game-hack In PDF document text
    • http://haertetechnik-steinbach.de/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://haertetechnik-steinbach.de/images/roblox-cheat-codes_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
stream_003_off00004ba4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA4 25780 bytes
SHA-256: 1b2a7e75de5aed6197c4f678fc1211f6a358d11fb5654fb6bd6bbeeea9f21932
font_01_sfnt_off0000857a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857A 17720 bytes
SHA-256: 8f572e18194144161629560968b1be47f6d3ca2e707ed2c38e953a7df1c42241

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