Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33fa140c427667b…

MALICIOUS

PDF

17.5 KB Created: 2019-04-30 18:00:21 +01:00 Authoring application: mPDF 5.7
MD5: f6fd3bb7a560cc439a2d316d02c1caaf SHA-1: a36cc59ce74f6365cafa8a1242dd798ff8f0c69a SHA-256: d33fa140c427667bd7d601aec62538ffd94d78544a4ef43c1704ea5a38747a47
90 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files hosted on xiixmcuin.linkpc.net. While the URLs themselves are currently marked as benign, the sheer volume and nature of these links suggest an attempt to manipulate search engine results or distribute potentially harmful content through a link farm strategy. No scripts were extracted from this sample.

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.net/1200203200200204206/Gefangen-by-Rox-C-.pdf
    • http://xiixmcuin.linkpc.net/9203200201201202/Hallo-Claire---I-miss-you-Marie-amp-Claire-1-by-Renate-Ahrens.pdf
    • http://xiixmcuin.linkpc.net/1200203200200205201/Gefangen-in-Der-Dunkelheit-by-Lisa-Fink.pdf
    • http://xiixmcuin.linkpc.net/1200203200200209207/Gefangen-Episode-3-by-Sydney-Stafford.pdf
    • http://xiixmcuin.linkpc.net/1200203200200205200/Gefangen-in-den-Highlands-by-Julianne-MacLean.pdf
    • http://xiixmcuin.linkpc.net/1200204202207209203/Der-Lehrling-und-ich---Gefangen-im-Lift-by-Tim-Langner.pdf
    • http://xiixmcuin.linkpc.net/1200203200200205205/Gefangen-in-den-Bleikammern-by-Ernst-Vlcek.pdf
    • http://xiixmcuin.linkpc.net/1201207208202209200/Gefangen-Die-letzte-Zeugin-by-simone-less-r.pdf
    • http://xiixmcuin.linkpc.net/1200203200200209208/Gefangen-in-einem-Schwur-by-Marion-Krafzik.pdf
    • http://xiixmcuin.linkpc.net/1200208201208200203/Transsexualit-t-Gefangen-im-falschen-K-rper-by-Jeanette-Banane.pdf
    • http://xiixmcuin.linkpc.net/9202203203200201/Der-weite-Weg-nach-Hause-Gefangen-in-Usbekistan-by-Jana-Graur.pdf
    • http://xiixmcuin.linkpc.net/1200205203208209205/H2O-Band-3---Gefangen-im-Netz-Pl-tzlich-Meerjungfrau-by-Rachel-Elliot.pdf
    • http://xiixmcuin.linkpc.net/1200201201207205201/Der-Himmel-kann-warten-Gefangen-in-der-Wildnis-by-Sandra-Brown.pdf
    • http://xiixmcuin.linkpc.net/1200200200206209201/Mit-dem-Baum-ber-den-Atlantik-The-Tree-Der-Australienmarsch-Gefangen-in-Jordanien-by-R-diger-Nehberg.pdf
    • http://xiixmcuin.linkpc.net/1201203204203209206/Ploughshares-Summer-2016-Guest-Edited-by-Claire-Messud-amp-James-Wood-by-Claire-Messud.pdf
    • http://xiixmcuin.linkpc.net/9202208205202208/Hope-Gefangen-und-missbraucht-Wie-wir-10-Jahre-in-den-F-ngen-des-Cleveland-Entf-hrers-berlebten-by-Amanda-Berry.pdf
    • http://xiixmcuin.linkpc.net/1208202201209/Claire-Murray-Nantucket-Inspirations-Designs-Charts-amp-Folklore-by-Claire-Murray.pdf
    • http://xiixmcuin.linkpc.net/7208200205203205/Claire-Voyant-The-Claire-Voyant-Series-Book-1-by-Rebeckah-K-Davis.pdf
    • http://xiixmcuin.linkpc.net/8209202205204205/Wahnsinn-im-Kopf-Gefangen-in-meiner-eigenen-Welt-Doch-ich-nahm-den-Kampf-gegen-die-Schizophrenie-auf-by-Lori-Schiller.pdf
    • http://xiixmcuin.linkpc.net/1200202209209209203/Hearts-of-Blue---Gefangen-von-dir-Hearts-Reihe-4-by-L-H-Cosway.pdf
    • http://xiixmcuin.linkpc.net/920220320