Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a0edb532b243d2…

MALICIOUS

PDF

41.1 KB Created: 2021-05-15 11:31:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b07a65e049fa54b96590d64337bbcbcd SHA-1: cd4207c8c3e14b00f96a94dd3c813bd1977c7f25 SHA-256: f5a0edb532b243d2a17b57bfb482c2a29a3883384ec98967a344c65be29ff494
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'free game hacks' and 'free spins' to entice users. It contains a large number of external links, many pointing to other PDF files hosted on whiteyaknepal.com, suggesting a link farm or redirection scheme. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-1-coin-master-game-hack, is likely a malicious redirector or landing page designed to deliver a second-stage payload.

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/406889139/coin-master-free-spins-1-coin-master-game-hack PDF link annotation
    • http://whiteyaknepal.com/userfiles/files/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://whiteyaknepal.com/userfiles/files/free-mod-apk-coin-master_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
stream_003_off000048c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C7 23868 bytes
SHA-256: 6f6c1c95c45c75eac54677f3d08de71d3ddb0cccdaa5717d357974ee870350bb
font_01_sfnt_off00007f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F10 17992 bytes
SHA-256: 6d8d99a319dc3508354c514a9dfb36b9314a67d789b860417dc5e127b03e5453

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