Malicious PDF — malware analysis report

Static analysis result for SHA-256 375beee733cfb933…

MALICIOUS

PDF

40.9 KB Created: 2021-05-15 03:00:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 420395f0a7b21c891023fb97c28cb7c5 SHA-1: 6ab2a51b4c5d4b2b51b934b70b8e0bf4095a840f SHA-256: 375beee733cfb9333dffaa03dc3ba203ba62340bf7b997bbaacb9368a4ffefaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, specifically targeting users with lures related to game hacks and free currency. The heuristic firings confirm the presence of malicious redirector links and a lure for game hacks. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious links, likely leading to a second-stage download or phishing attempt.

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/gameoffice-net-hack-coin-master-game-hack In PDF document text
    • http://kukuck.de/images/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/robux-gratis_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/coin-master-free-spins-daily-fb-champion_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_003_off00004746.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4746 24436 bytes
SHA-256: b808656403e4982a665bc6fde5e8327d88b65b95f6bb1c04a754c397dc47da91
font_01_sfnt_off00007e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5B 17976 bytes
SHA-256: c1b1a17e523e936b349f536870acacfad228736640955d12968774eefee3ad4d

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