Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f24477873490522…

MALICIOUS

PDF

41.9 KB Created: 2021-05-17 22:07:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 753b1fff80af090cad5433fe75ca06f3 SHA-1: 923f7039c9c0a3bdbc7fcc98aaafa947d9a14ef9 SHA-256: 5f24477873490522dc9746001e80db5d687bef294eac389d74c8acecce06e811
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 0.9971

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/roblox-tix-generator-game-hack PDF link annotation
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-devil_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/give-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-download_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-free-robux-no-human-verification_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49BE 24432 bytes
SHA-256: 2bc81e2d9e580fc3ee6802788ecae7949e25dee295bf71452eb20f283e8a36a9
font_01_sfnt_off00008182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8182 18236 bytes
SHA-256: c306490dc44d557a5a15fb05308447a7f7e02cb0664141b46cc1ed38f297bb82

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