Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec24b0e72a611c63…

MALICIOUS

PDF

33.1 KB Created: 2021-07-03 16:41:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 424ffb066f6aa4e5f9f3abe8c095161f SHA-1: 016e8a14ca730bb1d630772286b442e0b85be8f7 SHA-256: ec24b0e72a611c63cc01194538733010ef11dac3be294fa91eac153b0c51cf30
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector disguised as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure to trick users into visiting this malicious URL, likely to download further malware or engage in phishing. No scripts were extracted, but the primary attack vector is the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/835599320/free-tiktok-likes-no-human-verification-or-download-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-hack-pc-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/good-level-7-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-speed-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/adopte-me-hack-project-alpha-300-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/when-will-welcome-to-bloxburg-be-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-obc-thumbnail-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/real-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-i-get-free-robux-meme_GM431946152.pdfIn PDF document text
    • http://phenomventures.com/In 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_off00002ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC9 22364 bytes
SHA-256: 5375dbebec571d2885d45da78dc2e9122ade95150a50a6f4ab57eccd28d28b8a
font_01_sfnt_off00005c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C93 19088 bytes
SHA-256: 0fb460dabe8247348ae515a7df289e03e5445e6ce5d2eb2534604a8b634d24e2

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