Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec334cddc7106cff…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 18:51:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 886bf1c9c0dd71cdc148275d9842f175 SHA-1: b8bfb42c7cb6a75c58e967083bbc123545a74c18 SHA-256: ec334cddc7106cff8586ab2e620850d697e61b343f83bcc1cb59d10db0a766cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically luring users with game hack content. The document body and embedded URLs reinforce this lure, pointing to a known malicious redirector. The primary purpose appears to be directing users to potentially harmful content or further malicious sites.

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/431946152/how-to-change-your-name-on-roblox-for-free-game-hack In PDF document text
    • http://library.umla.ac.id/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-is-hacked_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/another-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/juego-hackeado-de-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-generator-no-verification_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
font_00_sfnt_off00002f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6F 22108 bytes
SHA-256: 680c4a49939d73fd7c190593eec87cb05f607915c099cde63f870039eefc80c3
font_01_sfnt_off0000608e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608E 19540 bytes
SHA-256: ce7cb55d619ef9cd49366302c9bae7af013f2cb024a6f61c136bed6f0a856416

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