Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39d5394706aa098…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 16:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d5da70939fcf0c0c103e3c5dd4032738 SHA-1: 6b7eb3099ecf1df54dfa99c99c3f89eef3d6d667 SHA-256: c39d5394706aa0981f3c94a6f0f8cba431e3a4a3226e21ffe1ecee02cbc399b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The presence of a visual download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. Although no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest it's designed to lead users to a malicious download or exploit page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/minecraft-mods-download-free-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/ho9w-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/generator-free-account-old-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-sunset-city-money-hack-2021-patched_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-for-mobile-24-com-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-roblox-no-plsy-stor_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-murder-mystery-2-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hccb-baseball-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-a-free-name-change-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-legend-of-the-fallen-kingdom-2-rpg-cheats_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEC 22352 bytes
SHA-256: 6b62faf4274c0f2536678f3413eb55ff4830963460bdcb68e9f756bccf212b04
font_01_sfnt_off0000608c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 18576 bytes
SHA-256: 7d81b8f4357a3ba39d5ed2eaef427c1fb3ec5456621d56fd5ab99f16751bc649

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