Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d56135dd38d55d…

MALICIOUS

PDF

19.8 KB Created: 2019-05-02 01:21:47 +01:00 Authoring application: mPDF 5.7
MD5: 9cccffe92a09e95b77e1da2b83243e5d SHA-1: cd1b2fb3129d5a9b3c0fc8ac07010b0941dcb7be SHA-256: a9d56135dd38d55d06c2492232604578d47f23cdeefe2f35fbd1017e27c14a77
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. While the specific URLs extracted were classified as benign, the sheer volume and the critical heuristic firing indicate a malicious intent to distribute content via link farms. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://loaminoo.linkpc.net/9090097098092097/Thilo-Schoder-1888-1979-Architektur-Und-Design-by-Thilo-Schoder.pdf
    • http://loaminoo.linkpc.net/9090097099092094/The-Art-and-Challenge-of-Translation-by-Raymond-V-Schoder.pdf
    • http://loaminoo.linkpc.net/9090097099092096/Paul-Wrote-from-the-Heart-by-Raymond-V-Schoder.pdf
    • http://loaminoo.linkpc.net/9090097098093091/Canine-Careers-Dogs-at-Work-by-Judith-Schoder.pdf
    • http://loaminoo.linkpc.net/9090097098093090/A-Reading-Course-in-Homeric-Greek-Book-2-by-Raymond-V-Schoder.pdf
    • http://loaminoo.linkpc.net/9090097098093094/A-Reading-Course-in-Homeric-Greek-Teacher-s-Manual-and-Answer-Key-by-Raymond-V-Schoder.pdf
    • http://loaminoo.linkpc.net/1091095098096097092/Lesetiger-Delfingeschichten-by-Thilo.pdf
    • http://loaminoo.linkpc.net/1091095098097098090/Heimlich-Fee-9-Wie-uns-das-Gl-ck-berrumpelte-by-Thilo.pdf
    • http://loaminoo.linkpc.net/1091095098097097095/1000-Gef-hle-Traumtyp-am-Filmset-by-Thilo.pdf
    • http://loaminoo.linkpc.net/7092099098093096/Natation-Le-crawl-et-les-battements-by-Thilo-Kuhlein.pdf
    • http://loaminoo.linkpc.net/9098090094098091/Wir-wollen-ins-Finale-Nichts-f-r-schwache-Nerven-by-Thilo.pdf
    • http://loaminoo.linkpc.net/1091095098096094090/Vier-durch-die-Zeit-7-Angriff-der-Wikinger-by-Thilo.pdf
    • http://loaminoo.linkpc.net/1091095098097097094/Heimlich-Fee-7-Wie-ich-pl-tzlich-eine-Zwillingsschwester-bekam-by-Thilo.pdf
    • http://loaminoo.linkpc.net/1090093093095098094/Kontexte-Der-Gewalt-in-Moderner-Chinesischer-Literatur-by-Thilo-Diefenbach.pdf
    • http://loaminoo.linkpc.net/1090096099095093094/Flucht-Und-Neubeginn-Zur-Wissenschaftslogik-D-New-Economic-History-by-Thilo-Sarrazin.pdf
    • http://loaminoo.linkpc.net/9098097094094097/Der-neue-Tugendterror-ber-die-Grenzen-der-Meinungsfreiheit-in-Deutschland-by-Thilo-Sarrazin.pdf
    • http://loaminoo.linkpc.net/9090097099092099/Ort-Im-Bezirk-Murau-Frojach-Katsch-Murau-Neumarkt-in-Steiermark-Schoder-Sankt-Lorenzen-Bei-Scheifling-Schonberg-Lachtal-by-Quelle-Wikipedia.pdf
    • http://loaminoo.linkpc.net/1091094095098092099/Mensch-Und-Umwelt-Die-Wirkungen-Der-Umwelt-Auf-Den-Menschen-by-Thilo-Eisenhardt.pdf
    • http://loaminoo.linkpc.net/1090096099094098095/Sarrazins-Thesen-Auf-Dem-Pr-fstand-Eine-Empirische-Widerlegung-Zentraler-Thesen-Thilo-Sarrazins-Mit-Bezug-Auf-Muslime-In-Deutschland-by-Naika-Foroutan.pdf
    • http://loaminoo.linkpc.net/4092094091092/Universal-Principles-of-Design-100-Ways-to-Enhance-Usability-Influence-Perception-Increase-Appeal-Make-Better-Design-Decisions-and-Teach-Through-Design-by-William-Lidwell.pdf