Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa88ba1d2f9b925f…

MALICIOUS

PDF

43.1 KB Created: 2021-05-20 04:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3a6416f457b1d70d038424215fdcb73e SHA-1: 1ac22366ce2b98e5af38d82978b6717efc4fa7e1 SHA-256: aa88ba1d2f9b925f695509792a354a8fc4755c591bddbc6246a1c8bb231357e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising 'free generators' or 'game hacks' for popular games and apps. The primary lure URL is https://netcdn.xyz/app/835599320/tiktok-free-8-ball-pool-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in freebies to lead them to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/835599320/tiktok-free-8-ball-pool-game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004688.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4688 28356 bytes
SHA-256: be71f3c497e75b2299d849ef30ce1c3638d6f300e91698b43cf373572aea9bce
font_01_sfnt_off00008609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8609 18340 bytes
SHA-256: 0bc0787563ed0f0582e4366d381af429706bdca7ed02708a6c3c46a294fd1364

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