Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7242a25a90ae523…

MALICIOUS

PDF

47.5 KB Created: 2021-06-10 23:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 59e9c9ab1b996f65207c05deca573e57 SHA-1: c696acde51d9806d90357779e274394bb90e0894 SHA-256: c7242a25a90ae5238e783142d352dad2159d27e028d988cce80a58cb784f4ae8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a known malicious redirector. The primary malicious link identified is https://netcdn.tw/app/431946152/robux-hack-no-human-verification-or-survey-2021-game-hack. This indicates a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/robux-hack-no-human-verification-or-survey-2021-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-code-2021-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/tiktok-free-watch_GM835599320.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-20-free-spins-link-2021_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_off000053a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A1 28248 bytes
SHA-256: eaf55f85aa7a6b8b27558187e7db0f69c6488d4bfb96042c9f009cb9e3317b0f
font_01_sfnt_off00009358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9358 19560 bytes
SHA-256: 489e753cea5114d57cbe25ae7709c12c41e740c5405d0694f47824ae542b7faf

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