Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a66a208928b0911…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 23:07:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6da1a531e9fa811350739b9d6da7242c SHA-1: a32ba618a90532ccfb7ee8297cad11916df92e26 SHA-256: 6a66a208928b0911643203390496e634a0886aa273aac388898624544163199f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency. The primary malicious URL identified is https://netcdn.online/app/431946152/how-to-get-free-robux-codes-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/how-to-get-free-robux-codes-2021-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-arsenal-hack_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_004_off0000500a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500A 29016 bytes
SHA-256: d8afadc713924f34fed98f7584239a88ad1ee899121f20c324809a21d89ed974
font_01_sfnt_off00008f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F79 18856 bytes
SHA-256: 204886f9a3a3d456a8ba924f34e84de86e5dda13901e78a872ce278a746af401

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