Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04ef5b6943207c9…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 20:29:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b3da2ff24cfb2ad548550a2750257c44 SHA-1: 7b6e063c9d50db5eaaa4315479fb84230d70f5e5 SHA-256: d04ef5b6943207c9860c751a026d726fa0d28ed129370a802df990e248cfc431
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and links to known malicious redirectors and IP addresses, masquerading as generators for game hacks and free currency. The document body, though partially garbled, contains references to 'Roblox' and 'Coin Master', reinforcing the lure. The presence of these links and the ML classification strongly indicate a phishing or scam attempt designed to lead users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/roblox-comroblox-game-hack In PDF document text
    • http://183.91.70.7//repository/coin-master-free-spins-link-app-download_GM406889139.pdfPDF link annotation
    • http://183.91.70.7//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://183.91.70.7//repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://183.91.70.7//repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://183.91.70.7//repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://183.91.70.7/repository/wurst-commands_GM479516143.pdfIn PDF document text
    • http://183.91.70.7/repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://183.91.70.7/repository/roblox-free-robux-glitch-2021_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_off00002f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F12 22356 bytes
SHA-256: ce6478a797c04390827849ca6fff2cf6ce88e18598b7a6f271a3936c3fa297df
font_01_sfnt_off000060dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DC 18748 bytes
SHA-256: 7b51ac7cd0d997d75be22500c2cba7076fd8e57e03e7cc1f9d0443fc391da534

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