Malicious PDF — malware analysis report

Static analysis result for SHA-256 df86a70f4cb54d30…

MALICIOUS

PDF

44.4 KB Created: 2021-06-10 18:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2e3db92e0a7b63691e5c154a138f9a43 SHA-1: d6317ead2595c17c5ceba33ace6e2c6e4c54d30c SHA-256: df86a70f4cb54d30360fd2946e7f70e28cf1725f4234221e63d2c9b6093919db
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded links and a visual download button, strongly suggesting a lure to download malicious content. The primary link points to a redirector infrastructure known to host malicious files, and the document body contains references to game hacks and free items, typical of social engineering tactics. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 3

  • 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.tw/app/431946152/cache-http-free-robux.club-game-hack In PDF document text
    • http://aviaprofsoyuz.info/images/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-hack_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-hack-ban_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-things-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-troll-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/774-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-that-actually-works-2021_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
font_00_sfnt_off00005159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5159 24600 bytes
SHA-256: 7525ffab6dffa66dd7678ae300af54c68148d167f88f2b60a00a5df8ec0396b7
font_01_sfnt_off00008954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8954 18864 bytes
SHA-256: 132d985fa40c2567e6c40b94ce2da792f30ec0d304b7a57174c55eac5e7710cc

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