Malicious PDF — malware analysis report

Static analysis result for SHA-256 08601de626f03b5f…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 04:47:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 1659a65949e07ca4e52a2d75675c6bc1 SHA-1: e3c78bc128ddef6486dcda66b9df99b63bdff9c7 SHA-256: 08601de626f03b5f10147651738920e30833c11ab3a2082c5d21383871a0ef80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure to download a file, likely a second-stage payload. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-free-coin-hack-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.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_004_off0000537c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x537C 25488 bytes
SHA-256: 4eab0bdc7d7a1fcfccefc8174ae03838524624b8352b86ed44079813627a1351
font_01_sfnt_off00008d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D57 17880 bytes
SHA-256: 9d1f455011f0aa7862855f259ab9ea2efa3be9ec050c3ec97e4c793879e57b5c

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