Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5c3e134e3754a1…

MALICIOUS

PDF

226.9 KB Created: 2021-07-05 08:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 538bb86ea03aa9bd14a37b1cee30462c SHA-1: 03e7402d1d76851934ca1767720ba0ce378a8be8 SHA-256: ae5c3e134e3754a1d2f472d1fbef23235aae6d5a8fd8ba295ec20ce847c7d2e7
250 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a redirector URL, masquerading as a 'free generator / game hack'. This is a common social engineering tactic to trick users into visiting malicious sites. The heuristics indicate a fake CAPTCHA, a browser extension lure, and a payment redirection lure, all pointing towards a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs and lures suggest the primary goal is to redirect the user to a malicious site for further exploitation.

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-kanto-ticket-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-2021-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pokemon-go-free-rare-candy_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hackear-una-cuenta-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-spins-on-coin-master_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_023_off0003205c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3205C 25576 bytes
SHA-256: c75f207b2cbad94bbf8e24ebb26086978f29acc4e41e90385b76b9cd783f8b66
stream_024_off00035c59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C59 18584 bytes
SHA-256: 19111b01c213a1e7c9957e7a96754d4585f9300c945a4e706f29478341d9b295

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