Malicious PDF — malware analysis report

Static analysis result for SHA-256 f433f37dabe491ad…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 15:42:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f10f7fbb891f95bf4b497f3081451b62 SHA-1: 75ae75e811ae90176621e75f38cfaa6911392c61 SHA-256: f433f37dabe491ad56a1ed554d34afffb54047a40fd346d8049363036b319705
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency'. The ML classifier and specific PDF heuristics strongly indicate malicious intent. The document's primary function appears to be luring users to click on these links, which likely leads to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/level-coin-game-hack In PDF document text
    • http://apx-centre.ru/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A4 25660 bytes
SHA-256: 9c3fc67c2efdad06929b65eb15ab4baa6eccbe8251aed1555b3f962ffa0ced1b
font_01_sfnt_off00008370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8370 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E74 17400 bytes
SHA-256: cd90f0e27c97aec7875c8622f96aaddce3568dbf304674e2b8a10a5ddcea6088

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