Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b257e6c996d7a3…

MALICIOUS

PDF

227.2 KB Created: 2021-07-08 06:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: cf12b26ec0e24f183b7d40b20f4c9d25 SHA-1: 8696faab8b580ba76df0ced587782fee5e65dabd SHA-256: d7b257e6c996d7a3f87b5c26a511af16197517b016ca1873b9e390f7fa1e5d44
250 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating malicious intent, including a redirector link disguised as a game hack and a fake CAPTCHA lure. The primary URL, http://netcdn.tw/app/1094591345/pokemon-go-free-remote-raid-pass-march-2021-game-hack, is associated with malicious redirector infrastructure. The document's content and heuristics suggest a social engineering attack aimed at tricking users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 7

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-remote-raid-pass-march-2021-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/website-roblox-cheat-new_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-cheap-hack-buy_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-kids-games-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/invisibleble-hack-roblox-wearedevs_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-make-a-vip-server-free-no-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/get-me-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/why-are-you-cheating-on-your-roblox-girlfriend_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-tiktok-famous-for-free_GM835599320.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-2021-no-verification_GM431946152.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_023_off00031f40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F40 25576 bytes
SHA-256: c01643178eb3b07e80b45c06c3e2b3c0086def63efa6f0158568bc69eeebda47
font_01_sfnt_off00035b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B3B 19324 bytes
SHA-256: d0697eee0e9c0fe5ac8eb99444517dc6ad057c46fedd70dd27ea1759c427954b

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