Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f64560f7311de38…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 09:44:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2d19e0f712b1ffd8a1b26e872d0a2767 SHA-1: 01ccf8e282d26123f9137a7957a11d1f3be58b6d SHA-256: 9f64560f7311de38292af0c8016d728e35f355c67ef98c7fe3f18b0958dc6b41
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and generators. The ML classifier also flagged this PDF with high confidence. The embedded links are designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware distribution.

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-free-card-link-today-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-para-robux-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-build-a-boat-for-treasure-cross-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-1-000-000_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hack-for-roblox-that-works_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-vetement-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-on-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-code-free-beyblade-burst_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_002_off00002f48.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F48 22824 bytes
SHA-256: 8d4840a045495864b95bd7fe2aa305a39adf076503b2aaff935936eab020933e
font_01_sfnt_off00006296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 18524 bytes
SHA-256: 1d32a336a71d5c191eba4f245b3915bbb5883ddf1c8a32dc77a5f4276a5d3a6e

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