Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f90d4835bfc2e7e…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 18:12:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1196a35ca5c1a3a5cc029c8abf5a353d SHA-1: 5dd3d3de3a3825ab4da4619dcf8f7101d0d874e0 SHA-256: 6f90d4835bfc2e7e20fe64b80e374950ceb21f811005cc659847bc0f56fd6aaa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free in-game currency and hacks, directing users to a known malicious redirector. The document body contains multiple URLs, including the primary malicious redirector, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful sites.

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/479516143/how-to-get-minecoins-in-minecraft-for-free-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-passwords-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-draw-uncopylocked_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-no-download-no-password_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-robux-com_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-make-a-minecraft-bedrock-server-for-free_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
font_00_sfnt_off00003235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 21740 bytes
SHA-256: 567f95d8c7301b03b93b967609d23a0717f8d0e24735c22d356d20eba474f522
font_01_sfnt_off000061c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 18164 bytes
SHA-256: 30674b0950fe3b175661e2115258e071aa6d1a839cd3a01eb7501d4a58649502

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