Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc9b5d26c2f1e8e…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 09:05:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: e945900706f9df7d9199d6e0405fe860 SHA-1: 0a57a46eddd41c656d9f51e371efa82c6964bbef SHA-256: 5bc9b5d26c2f1e8e170bb0a09d82bb1919a05a730a435f7f163c92344da48282
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game hacks and items. The document body explicitly mentions 'free generator / game hack' and includes a URL pointing to such content. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/how-to-get-free-likes-on-tiktok-for-free-game-hack In PDF document text
    • http://paro.net.ua/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://paro.net.ua/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://paro.net.ua/images/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://paro.net.ua/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://paro.net.ua/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://paro.net.ua/images/hack-coin-master-xyz_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_off00004812.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4812 24620 bytes
SHA-256: 05ba9faa5a3dcf4938e9b864aa6d66f95e952d73e217aadbad5c1ab4a316977a
font_01_sfnt_off000080db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DB 17620 bytes
SHA-256: 1c33fd3c5ea4f422d018a8404ca3ef9e1ac10e3d86ac92994d8eaeb97cd646a5

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