Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9b0c2705b949e0…

MALICIOUS

PDF

18.1 KB Created: 2019-04-30 02:53:04 +01:00 Authoring application: mPDF 5.7
MD5: 822df596755c4ebccc27ac861e1f2552 SHA-1: c1d0bcef5b4cc1d992cfe5f204ab1c8123f19e87 SHA-256: 7a9b0c2705b949e0c2d1b08206b0843f36ee5758f09b033ae4a63269b1bcf4c2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, many of which are structured with numeric slugs. This technique is often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent. The primary attack pattern observed is the distribution of links to potentially malicious content.

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://loaminoo.linkpc.net/3090093099098092/Flora-s-Fury-Flora-Trilogy-3-by-Ysabeau-S-Wilce.pdf
    • http://loaminoo.linkpc.net/1093095099097096/Flora-Segunda-Flora-Trilogy-1-by-Ysabeau-S-Wilce.pdf
    • http://loaminoo.linkpc.net/8097092099093098/Jack-Lark-Recruit-Jack-Lark-0-6-by-Paul-Fraser-Collard.pdf
    • http://loaminoo.linkpc.net/8097092099093096/Jack-Lark-Redcoat-Jack-Lark-0-7-by-Paul-Fraser-Collard.pdf
    • http://loaminoo.linkpc.net/2095097098092096/The-Rise-of-Respectable-Society-A-Social-History-of-Victorian-Britain-1830-1900-by-Francis-Michael-Longstreth-Thompson.pdf
    • http://loaminoo.linkpc.net/5095094092091098/The-Sweetly-Diabolic-Art-of-Jim-Flora-by-Jim-Flora.pdf
    • http://loaminoo.linkpc.net/1090094096094092095/Direktor-Prof-Dr-Thom-s-Flora-Von-Deutschland-sterreich-Und-Der-Schweiz-in-Wort-Und-Bild-Vol-11-Abteilung-1-Kryptogamen-Flora-Moose-Algen-Flechten-Und-Pilze-Die-Farne-Befinden-Sich-in-Band-1-Etwa-30000-Arten-Und-Variet-ten-Bearbeitet-Von-by-Otto-Wilhelm-Thom.pdf
    • http://loaminoo.linkpc.net/1090097099097093094/The-Lost-King-of-Oz-Oz-Thompson-and-others-19-by-Ruth-Plumly-Thompson.pdf
    • http://loaminoo.linkpc.net/4095092097092099/Rise-Sister-Rise-A-Guide-to-Unleashing-the-Wise-Wild-Woman-Within-by-Rebecca-Campbell.pdf
    • http://loaminoo.linkpc.net/2091090099096098/The-Writings-of-David-Thompson-Volume-1-The-Travels-1850-Version-by-David-Thompson.pdf
    • http://loaminoo.linkpc.net/2099097098093097/Sir-s-Rise-Rise-of-the-Dominants-Book-One-by-Red-Phoenix.pdf
    • http://loaminoo.linkpc.net/8097092098096099/The-Lark-by-E-Nesbit.pdf
    • http://loaminoo.linkpc.net/1095090094093096/Some-Say-the-Lark-by-Jennifer-Chang.pdf
    • http://loaminoo.linkpc.net/1092091096095091/Lark-by-Tracey-Porter.pdf
    • http://loaminoo.linkpc.net/8097092099096092/The-Book-of-Dog-by-Lark-Benobi.pdf
    • http://loaminoo.linkpc.net/8097092099096098/Ostrich-and-Lark-by-Marilyn-Nelson.pdf
    • http://loaminoo.linkpc.net/1099099095094/Lark-in-the-Morning-by-Nancy-Garden.pdf
    • http://loaminoo.linkpc.net/8097092098099095/Lark-Holds-the-Key-by-Natasha-Deen.pdf
    • http://loaminoo.linkpc.net/3092093098094094/A-Lark-Ascending-by-John-B-Campbell.pdf
    • http://loaminoo.linkpc.net/4093095096091093/Like-the-Dawn-Lark-3-by-Erica-Cope.pdf

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