Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab9c620964edb92…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 17:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9e99545b35ca77524b0bb08e0f9190d0 SHA-1: c9c7d79e942f2540d3ea45f9b23701053440d9d3 SHA-256: 7ab9c620964edb9281d1f68a313f37671eca2e2be0336eb6e40919b694fe384e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and other PDF files, all promoting game hacks and free in-game currency. The document body and embedded URLs strongly suggest a lure for users interested in obtaining free items for games like Roblox and Coin Master. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/roblox-cheat-engine-robux-no-survey-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/free-unused-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-admin_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-knife-simulator-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/get-free-robux-skin-tone_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-into-accounts-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/my-roblox-gf-cheated-on-me_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-pet-adopt-me-roblox-code_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
font_00_sfnt_off00002eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB4 22836 bytes
SHA-256: a0741f273d754525dcc55f35f07712808f6e49defd6e2e8299e4247eb128c262
font_01_sfnt_off00006200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6200 19308 bytes
SHA-256: f0651baee2c8c42b7f5e8cf59399d25df1557693d2a3766366c55a30a040c39f

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