Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb104cb6b8e0a89…

MALICIOUS

PDF

226.0 KB Created: 2021-07-06 04:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c8b765f203661c9580df48c15fc6d1e9 SHA-1: 8b98edea78b2a7e80d9fc0f9b7289226225b4f21 SHA-256: 9eb104cb6b8e0a89ad7f9ad92fc340e6a0289286f9bd11f1a5bf656142409d37
250 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating social engineering lures, including a fake CAPTCHA and a "free generator / game hack" theme. The primary URL, http://netcdn.tw/app/1094591345/pokemon-go-free-poke-coin-game-hack, is identified as a malicious redirector. The document body, though heavily truncated and containing non-readable characters, appears to reinforce the lure with similar themes and the target URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

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-poke-coin-game-hack In PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-cheat-website_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hacks-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/get-free-robux-2021-samsung_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-studio-cheat-sheets_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-gift-card-codes-2021-generator_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/is-roblox-free-on-a-computer_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-exectuer-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-generator-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-program_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/minecraft-free-download-android-apk_GM479516143.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_off00031d39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D39 25576 bytes
SHA-256: 4ae0deae73bcf618a04d1f3ebb8b25f4b1252f0ac62097dcdb7cd62d0937140b
font_01_sfnt_off0003593e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3593E 18476 bytes
SHA-256: eb1a4e85d53719ca5fcedb1f5d4cec54a0ff23e254d90d203bf7dc2808577711

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