Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0723c7c6941e8e…

MALICIOUS

PDF

15.4 KB Created: 2019-04-30 10:03:56 +01:00 Authoring application: mPDF 5.7
MD5: 1edf39fa87ffc4b9f91d2d525102658f SHA-1: 3a4e21ef24e3f176379cfee8b8215960d3345884 SHA-256: 3f0723c7c6941e8e34e9af89fe71a1cbadce384e3d7d3bd46c453407c113c78e
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 URLs themselves are currently marked as benign, the sheer volume and the heuristic firing of PDF_SEO_LINK_FARM indicate a malicious intent, likely to manipulate search engine results or redirect users to malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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/4096092090096093/Nocturne-Hours-of-the-Night-2-by-Irene-Preston.pdf
    • http://loaminoo.linkpc.net/5096090094098093/Sweet-Dreams-Irene-Irene-Kelly-2-by-Jan-Burke.pdf
    • http://loaminoo.linkpc.net/1097092099095092/Dear-Irene-Irene-Kelly-3-by-Jan-Burke.pdf
    • http://loaminoo.linkpc.net/9096090091096092/Remember-Me-Irene-Irene-Kelly-4-by-Jan-Burke.pdf
    • http://loaminoo.linkpc.net/1090095094098093093/Anders-Gedacht-Text-and-Context-in-the-German-Speaking-World-by-Irene-Motyl-Mudretzkyj-by-Irene-Motyl-mudretzkyj.pdf
    • http://loaminoo.linkpc.net/9090093091091/Infamous-by-Suzanne-Brockmann.pdf
    • http://loaminoo.linkpc.net/4096099092091092/Infamous-It-Girl-7-by-Cecily-von-Ziegesar.pdf
    • http://loaminoo.linkpc.net/4098093098099092/An-Infamous-Army-by-Georgette-Heyer.pdf
    • http://loaminoo.linkpc.net/3097099092097093/Infamous-Chronicles-of-Nick-3-by-Sherrilyn-Kenyon.pdf
    • http://loaminoo.linkpc.net/1092094091092090/Infamous-Fame-Game-3-by-Lauren-Conrad.pdf
    • http://loaminoo.linkpc.net/6090096090092090/The-Gift-of-a-Child-The-Infamous-Maitland-Brothers-1-by-Sue-MacKay.pdf
    • http://loaminoo.linkpc.net/8096097093094097/The-Infamous-Italian-s-Secret-Baby-by-Kazumi-Kamiya.pdf
    • http://loaminoo.linkpc.net/1097097090094095/The-Infamous-Rogue-The-Hawkins-Brothers-1-by-Alexandra-Benedict.pdf
    • http://loaminoo.linkpc.net/8095093098093/An-Infamous-Army-Alastair-Audley-4-by-Georgette-Heyer.pdf
    • http://loaminoo.linkpc.net/4098091095094099/Infamous-Desire-Maid-for-the-Billionaire-Prince-3-by-Artemis-Hunt.pdf
    • http://loaminoo.linkpc.net/2090094096091099/The-Infamous-Miss-Ilsa-Fraser-Springs-2-by-Laine-Ferndale.pdf
    • http://loaminoo.linkpc.net/1091093094092092/Never-Dare-a-Wicked-Earl-Infamous-Lords-1-by-Renee-Ann-Miller.pdf
    • http://loaminoo.linkpc.net/9099090096098097/Herrin-The-Brief-History-of-an-Infamous-American-City-by-John-Griswold.pdf
    • http://loaminoo.linkpc.net/9091098095092/Remembering-Scottsboro-The-Legacy-of-an-Infamous-Trial-by-James-A-Miller.pdf
    • http://loaminoo.linkpc.net/2098092098099094/Mostly-Rapscallions-Salient-Sillies-about-the-Rich-and-Infamous-in-History-by-P-J-Sullivan.pdf
    • http://loaminoo.linkpc.net/80

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