Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fc10ea201ed911…

MALICIOUS

PDF

41.7 KB Created: 2021-05-15 07:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 693a12b5563825e4b82ed24900383f42 SHA-1: d3636592bce764c67875e3bd77a8961b339945d5 SHA-256: f4fc10ea201ed9113be9b1ac4fc1f5d3472bb871c95806c9a03d57ea7d335da4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs confirms a redirection-based attack. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leading to further malicious content or downloads.

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/coin-master-spin-free-game-hack In PDF document text
    • http://italyfixer.com/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://italyfixer.com/images/free-coins_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://italyfixer.com/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/corn-master_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://italyfixer.com/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://italyfixer.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • http://italyfixer.com/images/free-robux-com-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_off00004a7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7D 24524 bytes
SHA-256: 6fd6cadeea69e69c11dcd9b5d3d7a73f63062d9870da8362e28e7c1c57c0a892
font_01_sfnt_off000081cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81CD 17884 bytes
SHA-256: f64f8d8cd546afe107dcd88d9ce91258665e3d619825ef5ba403a2abc0c27184

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