Malicious PDF — malware analysis report

Static analysis result for SHA-256 f418649aecaf730d…

MALICIOUS

PDF

37.6 KB Created: 2021-05-22 07:12:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b23751719874ea2b1b9c896077387fe6 SHA-1: 71073abb9b39ea8326e5e5157715c5ef2f1e17af SHA-256: f418649aecaf730d71763b1a6e547a843ae0b70fa95362ad8bdf662a8df86e51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links disguised as a lure for free game items or accounts, such as "Free Minecraft Premium Account". These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/free-minecraft-premium-account-game-hack In PDF document text
    • http://huebner-baustoffe.de/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://huebner-baustoffe.de/images/free-coin-master-spins-blog_GM406889139.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_002_off000033f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F6 27452 bytes
SHA-256: 797cb637a78e39750e4a7322315ebb290af8072ae9be2931d95e03e3bbe76ce0
font_01_sfnt_off00007217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7217 18264 bytes
SHA-256: d2b91c2a6de84c5c57e6f7a8c0463896f89b33dea675ffd93dbde2c8d35c79e1

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