Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c9336cb209164c…

MALICIOUS

PDF

50.0 KB Created: 2021-06-09 15:59:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 79aa2df2592161fc6c07ff4e551fc50c SHA-1: ba2e2fa276b034aec1cbfc8b5c9df7b9f69100bb SHA-256: 72c9336cb209164ca5abe1f2ac5e9b4e62137c153526a68b45142f2d9f706271
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "game hacks" or "free currency generators." The primary lure, 'how-to-hack-in-any-roblox-account-2021-game-hack', directs users to the malicious URL https://netcdn.tw/app/431946152/how-to-hack-in-any-roblox-account-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attack designed to compromise user accounts or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-hack-in-any-roblox-account-2021-game-hack In PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/www-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-for-xbox-1_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005282.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5282 27356 bytes
SHA-256: 8d418789c152031d07bc44f4a6328f95fae2f32ab710f7c667df68f2db135bbb
font_01_sfnt_off000090bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BC 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DCD 19172 bytes
SHA-256: 4b1fa1faf105b99fd2923f47d0688e1f5468398e24b7e936b3f5f66a590f08a3

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