Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca0f19bfc277bdf…

MALICIOUS

PDF

34.3 KB Created: 2021-06-27 13:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: de160c94a3c0ca6590d21842e31b8493 SHA-1: 3f7d1354589df8461d7022805974aee6860d0190 SHA-256: 4ca0f19bfc277bdfbd340d566cc0ebea19faeaffaecc8a5ba268e4359ec361fa
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/431946152/free-good-roblox-exploit-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/daily-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/ultimate-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-speed-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/wall-hack-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-legal-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/calamari-roblox-free-acounts_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_off00002daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DAF 22620 bytes
SHA-256: 582c29b60f95cfb72411bb0ff07ae1c8caf022649eb431e2737b73e7be1a515a
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 19224 bytes
SHA-256: ce3d50c1b59ec46755f4051f0cc8d51a2a77306588e1fdf7a3e6899ed158403a

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