Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fcf707a80d3b64…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 23:43:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ec84c6ecf82a6b33e2d3405d96609d02 SHA-1: 0c4a2e2450b8064c2db1ee881485572243c2facf SHA-256: 73fcf707a80d3b6412e196e50b8dff245c93606ba4af12287524216e22f7167a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to appear as 'free generators' or 'game hacks', redirecting users to a link farm of other PDF documents. The primary lure is to trick users into clicking these links, likely leading to further malicious content or scams. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/bux-life-free-robux-game-hack PDF link annotation
    • http://ddsadler.net/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • http://ddsadler.net/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://ddsadler.net/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://ddsadler.net/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://ddsadler.net/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ddsadler.net/images/coin-master-hacks-2021_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_off0000488f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x488F 25356 bytes
SHA-256: fd19ff8803730448771eda1c29dba87de6617767b5282f747cc760b8fed99ecb
font_01_sfnt_off0000825a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 18136 bytes
SHA-256: 29dc967668ee0d992c179c4e94ca6f9cb219d50b5ccf800f63d20fdab69e699e

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