Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c7a6b2a38fa418…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 10:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: efa1208d76e0fe538d5a8d8ce00d348f SHA-1: 555e21d5d1ba4da977f1acaa8d527cfd863a93ae SHA-256: b0c7a6b2a38fa418f265cdd29e63cba8cbc5f366f854dfc0f657960482d08899
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on a URL promising free game currency or hacks. The primary link redirects to a known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded links suggest a social engineering tactic to drive traffic to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/how-to-get-free-robux-fast-and-easy-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-hacks-com_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_off0000535d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x535D 25524 bytes
SHA-256: b6b0441bde97069eea1d35732af3b3f6d9e1b7a49b4571d38500dc6688ae248e
font_01_sfnt_off00008e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3E 18864 bytes
SHA-256: 264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09

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