Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93a309b7710800a…

MALICIOUS

PDF

48.6 KB Created: 2021-05-14 00:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 134e552b2921fa938ecb8bbd1e05f328 SHA-1: b566a9678d187d4abea2cfa8aaad71f6d1786656 SHA-256: d93a309b7710800abd91dfbfc683b2b829b2597e341ed1167d4ca7519f9c03e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors and lures for game-related cheats and currency. The primary lure directs users to 'netcdn.xyz', which is flagged as a malicious redirector. The document body also contains numerous URLs pointing to other lure documents hosted on 'firstaidacademy.be', suggesting a campaign distributing fake generators and hacks. No scripts were extracted, but the PDF structure and embedded links indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/406889139/coin-master-hack-8-ball-pool-game-hack In PDF document text
    • http://firstaidacademy.be/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/robux-today_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004881.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4881 26460 bytes
SHA-256: 490902dab0a1c30f77e58e60538f65b2aedc3c76b6e0dd2095b72c5543c8177e
font_01_sfnt_off00008346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8346 4028 bytes
SHA-256: a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91
font_02_sfnt_off000090e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90E7 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD7 18372 bytes
SHA-256: a36c8568268bd3843c99b13e037ad7d172b032abb8e2fd77dcfbea09e612cebb

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