Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f194ceb8eaf7c1a…

MALICIOUS

PDF

41.7 KB Created: 2021-05-15 03:51:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5de801e81ec1cd0e8a17b815586655c6 SHA-1: d198e8836920e700b6f1b4d381aa17b5865b5c5b SHA-256: 5f194ceb8eaf7c1a617c9c12e764ee0cfb30b08d998ab8ad2b469a79cc33e307
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and websites advertising 'free generators' or 'game hacks', indicating a lure for users. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further stages of infection or scam pages.

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/how-to-get-free-spins-on-coin-master-ios-game-hack In PDF document text
    • http://apx-centre.ru/images/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-verification_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-do-i-get-free-robux-on-roblox_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_off00004994.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4994 24648 bytes
SHA-256: d63aaa46b7e9bfc5bce1302e269c03d5a57f42ce4fa7fb4894b638dd9d0f361b
font_01_sfnt_off00008171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8171 18052 bytes
SHA-256: 751b5bf5e2baa224d49100cdcfdcfacb8a421785831d1efd4091db32238aca98

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