Malicious PDF — malware analysis report

Static analysis result for SHA-256 1687c70069b2579b…

MALICIOUS

PDF

47.1 KB Created: 2021-05-12 06:12:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b56835a9b023b9409500b12fe54df3aa SHA-1: 56e119f3abd7ea6f1c89c612e48390d7b4b3ae71 SHA-256: 1687c70069b2579b229a458d337d517e0e508ed7d05753347af4f7e3344a639d
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 0.8948

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/google-how-do-you-get-robux-game-hack PDF link annotation
    • https://tokunfome.com.br/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://tokunfome.com.br/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://tokunfome.com.br/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://tokunfome.com.br/images/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A51 25676 bytes
SHA-256: 2b5add866d24108bf015519e822ccc42b295d568dabe8ce575ff205ee2499584
font_01_sfnt_off00008628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 4008 bytes
SHA-256: 515da38a799acdefd039af3a0dfb6ec4815b572058c9bd492ec5a77cd7658593
font_02_sfnt_off000093b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B4 18812 bytes
SHA-256: feb1a9118afec68bc04581c8785d3317eaa63f31aad7b08e8712898c0d5a9a77

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