Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa36b1f10cc43d9…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 08:37:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0cee9747bcffce8462dadb137a040e1a SHA-1: 69418a67696afdb6078395386a5c942a3af832a8 SHA-256: faa36b1f10cc43d9f73df6b227e1090a381118a7fb27d11629125ea41ea239f3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links designed to lure users into clicking on what appears to be a 'game hack' or 'free spins' generator. The primary link, http://netcdn.tw/app/406889139/coin-master-hoe-to-get-extra-free-spins-game-hack, is flagged as a malicious redirector. The document's structure and embedded URLs suggest a phishing or scam attempt, likely aiming to direct users to potentially malicious websites or download further malware. No scripts were extracted, but the PDF's nature and the heuristic firings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-hoe-to-get-extra-free-spins-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/pokemon-go-free-map_GM1094591345.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-stuff-on-roblox-ios-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-command-cheat_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-pet-paradiese-hack_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/www-roblox-cheat-codes-com_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-coin-master-without-root_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_002_off00003512.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3512 22468 bytes
SHA-256: ed9506d4ebecc9165475b9d23d4088863fcbb7dba994bf9c92b51bf7a8328e7a
font_01_sfnt_off00006710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6710 18384 bytes
SHA-256: 6172b2728ec80ea06aed9adde43ce4503c90957b8bc0762058e1569cf76c303d

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