Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa846ea0f44b19e8…

MALICIOUS

PDF

36.3 KB Created: 2021-07-03 18:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d94cabe8d76e8e40c167ca892435ed51 SHA-1: 96cad944321f53baeb24e487720be8e8b81f9839 SHA-256: fa846ea0f44b19e8df8a6f059edcf88d83eab28044a10c4a465d71a3f6d7ad51
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a site offering 'free generator / game hack' content, which is a common lure for malicious activity. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-spins-coin-master-2021-game-hack, which likely serves as a gateway to further malicious content or downloads.

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/free-spins-coin-master-2021-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/pastebin-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/tik-tok-free-fire-30-detik_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/como-hackear-vehicle-simulator-roblox-para-tener-12000000-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-on-a-computer-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-account-hacken_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/red-line-30-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-master-spins-link_GM406889139.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_off0000341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341C 24024 bytes
SHA-256: f6a08dc7638832488be0fd6f9bfdb43b49e15ecaf80f16c869381cbfb831984c
font_01_sfnt_off00006a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A90 18576 bytes
SHA-256: 461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440

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