Malicious PDF — malware analysis report

Static analysis result for SHA-256 70705469e6bda87f…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 00:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 973bde8a2c0c09f4701843b98f9f246c SHA-1: ee34c5fc95652af03ec8119ea2b9bbaf4fdfb169 SHA-256: 70705469e6bda87fdfd9b84490cb8ae11f4edd53afd87db29078bbc51d7c7be8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary lure URL is https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-doing-anything-2021-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a social engineering attempt to lead users to potentially harmful content.

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-doing-anything-2021-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/daily-coin-master-free-spin-link-facebook_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_off00004b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B59 28096 bytes
SHA-256: b59d1aa67ebfd33f5fca2001d27231014042b69d8384d8f40c9fbd9fd2e6b700
font_01_sfnt_off00008bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCE 19804 bytes
SHA-256: 7de61e10f8b36a8651a25a8843179e8b1ecc4bebcf46d2f81f98618caa29dc1a

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