Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c82c80148dc5dfd…

MALICIOUS

PDF

17.5 KB Created: 2020-02-20 00:06:14 +00:00 Authoring application: mPDF 5.7
MD5: 0d42c115f1e206210ff75eca1da02d35 SHA-1: 7cc140d775bdb4be14046bac7918436f5080ca84 SHA-256: 8c82c80148dc5dfd4d2b68e2ef79cd9043dce1e49ae5dd65d03dff6d6e97e96a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified as a link farm. While the ML classifier strongly suggests maliciousness, the specific intent beyond link distribution is unclear as no scripts were extracted and the document body is heavily obfuscated. The primary attack pattern appears to be the distribution of numerous links, likely for SEO poisoning or to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 2

  • 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.
  • 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 http://xiixmcuin.linkpc
    • http://xiixmcuin.linkpc.net/3205209200207208/Deadly-Double-Florida-Mystery-Double-Feature-2-by-Diane-Capri.pdf
    • http://xiixmcuin.linkpc.net/3205209203206200/Florida-Is-Murder-Due-Justice-and-Surface-Tension-Mystery-Double-Feature-by-Diane-Capri.pdf
    • http://xiixmcuin.linkpc.net/4205201209204203/A-Night-at-the-Operation-Double-Feature-Mystery-3-by-Jeffrey-Cohen.pdf
    • http://xiixmcuin.linkpc.net/1200203209209206208/Double-Double-How-to-Double-Your-Revenue-amp-Profit-in-3-Years-or-Less-by-Cameron-Herold.pdf
    • http://xiixmcuin.linkpc.net/1205208201202206/Double-Shot-A-Goldy-Bear-Culinary-Mystery-12-by-Diane-Mott-Davidson.pdf
    • http://xiixmcuin.linkpc.net/3209207200209200/Cobalt-City-Double-Feature-by-Erik-Scott-de-Bie.pdf
    • http://xiixmcuin.linkpc.net/3208200202203203/Double-Feature-Timber-Ridge-Riders-9-by-Maggie-Dana.pdf
    • http://xiixmcuin.linkpc.net/3201200204207206/A-Florida-Keys-Double-Shot-by-Tom-Winton.pdf
    • http://xiixmcuin.linkpc.net/9206204207201208/Butch-Fatale-Dyke-Dick---Double-D-Double-Cross-by-Christa-Faust.pdf
    • http://xiixmcuin.linkpc.net/1201206205202202/Double-Threats-Forever-Double-Threat-4-by-Julie-Prestsater.pdf
    • http://xiixmcuin.linkpc.net/3203206202200209/The-Double-Cross-System-The-Incredible-True-Story-of-How-Nazi-Spies-Were-Turned-into-Double-Agents-by-J-C-Masterman.pdf
    • http://xiixmcuin.linkpc.net/3207208203206201/Double-Pleasure-Double-Pain-by-Nikki-Rashan.pdf
    • http://xiixmcuin.linkpc.net/2204201208208202/Double-Time-Double-Threat-3-by-Julie-Prestsater.pdf
    • http://xiixmcuin.linkpc.net/9200206202209203/A-Stitch-in-Time-Basket-Stitch-Double-Cross-Spider-Web-Rose-Double-Running-by-Victoria-Bateman.pdf
    • http://xiixmcuin.linkpc.net/1206204207205206/Double-Double-by-Michael-Jan-Friedman.pdf
    • http://xiixmcuin.linkpc.net/4209207202206206/Double-Nickels-Forever-A-Tribute-to-Double-Nickels-on-the-Dime-and-the-Minutemen-by-Craghead-Warren.pdf
    • http://xiixmcuin.linkpc.net/3205206202205204/Double-Take-A-Mike-Connolly-Mystery-2-by-Joe-Hilley.pdf
    • http://xiixmcuin.linkpc.net/1207209202200206/Double-Mayhem-A-Seekers-Mystery-by-Sam-Berretti.pdf
    • http://xiixmcuin.linkpc.net/1208208208205207/Double-Threat-My-Bleep-Double-Threat-2-by-Julie-Prestsater.pdf
    • http://xiixmcuin.linkpc.net/3201208205201207/Double-Booked-for-Death-Black-Cat-Bookshop-Mystery-1-by-Ali-Brandon.pdf

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