Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5560fe0cbbdbc38…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 22:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 604694b2050a48eaaa2cd776f0831dbb SHA-1: 3c275d3dffa5be52dee5ab77ce19770fbea0f486 SHA-256: e5560fe0cbbdbc38883921d147c4356a829d59b012b45661236b1f5144965370
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 0.9865

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.online/app/406889139/coin-master-hack-apk-ios-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off0000508d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x508D 24588 bytes
SHA-256: 817582324e1ac69368bf52daf66e1df450a268fd737ce52732b589dffac9db8f
font_01_sfnt_off00008828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8828 17892 bytes
SHA-256: 842ebafe75553617aa3406336693b508b1df3cd42ae030bb56c7cc7ab7429b4f

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