Malicious PDF — malware analysis report

Static analysis result for SHA-256 192a054a316eb37d…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 03:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 400219eda893573e1dbe1adab8956547 SHA-1: 28d583f15e7f754c96eeb5549ccf56aed9ba54bc SHA-256: 192a054a316eb37d7516e8db9c68edb9093caa4cc599fd6f03b446cd49553b79
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game currency and hacks, directing users to malicious redirector infrastructure. The embedded URL https://netcdn.xyz/app/431946152/free-robux-hack-no-human-verification-or-survey-game-hack is flagged as a known malicious redirector. The document's content and heuristics strongly suggest a phishing or scam attempt designed to lead 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 https://netcdn.xyz/app/431946152/free-robux-hack-no-human-verification-or-survey-game-hack In PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/coin-master-game-hack-version-download_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/moon-active_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sgsacall.sgsa.gov.mn/files/editor/files/free-robux-games-on-roblox_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_off00004ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECB 26772 bytes
SHA-256: f9a2714da8398a1a0036720a42ba9a47f76668038009a9971f3fb79f7ea9257e
font_01_sfnt_off00008c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C65 19324 bytes
SHA-256: 661bab6f3a048473b92ec1de100f4f76f72057f0f8e039014173720ccd048479

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