Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ea0f0733cc5320…

MALICIOUS

PDF

43.6 KB Created: 2021-06-04 01:05:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fee4b89f2bb32fdda7e38e6e56673b02 SHA-1: ba60a6551e623bc094be39e23ab3c9fd56706d3d SHA-256: 93ea0f0733cc5320cfff11d5c94eb94d784b789d6725f165f9ac0567a8c0261c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, disguised as 'free generators' or 'game hacks'. The primary malicious URL identified is https://netcdn.online/app/835599320/tiktok-free-view-300-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a lure to download or navigate to malicious content, likely as a first stage in a larger attack chain.

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/835599320/tiktok-free-view-300-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/lvl7-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-coin-master-hacks_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
stream_004_off00004b9a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B9A 26400 bytes
SHA-256: 925864ef1a5b69400887179d345abdc339627ddd057faf51386fcbc5784f4be6
font_01_sfnt_off00008808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8808 18100 bytes
SHA-256: 2d44a100b32b829fa28c0b825b58d352e76dbddf39e4a184ec725028a21dc124

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