Malicious PDF — malware analysis report

Static analysis result for SHA-256 503306f63c39e2b5…

MALICIOUS

PDF

24.6 KB Created: 2019-04-30 03:53:46 +01:00 Authoring application: mPDF 5.7
MD5: afa5740bfb3e45a5ace09ad0e92ff356 SHA-1: b0f590e032c662f911583497ab76849180d1f3da SHA-256: 503306f63c39e2b5d8935faada8e8d2b416817d81e191394ac2c9dfc2bf0a3ea
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, constituting a link farm. The primary heuristic indicates a critical PDF_SEO_LINK_FARM, suggesting the document's purpose is to direct users to a multitude of external PDF files. While the ML classifier also flagged the PDF as malicious, no scripts were extracted, and the majority of the identified URLs were labeled as confirmed benign, reducing confidence in a direct payload delivery. The attack pattern is likely a lure to a content aggregation site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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/5091090092099090/Beyond-Silence-Chinese-Canadian-Literature-in-English-by-Lien-Chao.pdf
    • http://loaminoo.linkpc.net/6095097099090092/The-Chinese-Knot-And-Other-Stories-by-Lien-Chao.pdf
    • http://loaminoo.linkpc.net/1091097099095092098/French-Sinologists-Treatises-on-Chinese-Literature--contemporary-Literature-by-Qian-Linsen.pdf
    • http://loaminoo.linkpc.net/9094098092090091/Chinese-Short-Stories-by-Revolutionary-Authors---Read-Chinese-Literature-with-Detailed-Footnotes-Pinyin-Summaries-and-Audio-by-Kevin-John-Nadolny.pdf
    • http://loaminoo.linkpc.net/4096092099097094/The-Water-Dragon-A-Chinese-Legend---English-and-Chinese-bilingual-text-by-Li-Jian.pdf
    • http://loaminoo.linkpc.net/2092092091097099/Creation-of-the-Gods-Library-of-Chinese-Classics-Chinese-English-4-Volumes-by-Xu-Zhonglin.pdf
    • http://loaminoo.linkpc.net/7091090090094099/Les-fondations-du-lien-amoureux-Lien-social-by-Rapha-le-Miljkovitch.pdf
    • http://loaminoo.linkpc.net/4099090094095098/The-Cambridge-Companion-to-Canadian-Literature-by-Eva-Marie-Kr-ller.pdf
    • http://loaminoo.linkpc.net/5090097093099092/Third-Solitudes-Tradition-and-Discontinuity-in-Jewish-Canadian-Literature-by-Michael-Greenstein.pdf
    • http://loaminoo.linkpc.net/9093098099095091/Proceedings-of-the-Second-April-Conference-of-University-Teachers-of-English-Cracow-1981-April-23-29-Papers-in-English-and-American-Literature-Cul-by-Irena-Kaluza.pdf
    • http://loaminoo.linkpc.net/1091093092096093098/History-of-Chinese-Literature-by-Wolfgang-Kubin.pdf
    • http://loaminoo.linkpc.net/1094092091098097/Screening-Gender-Framing-Genre-Canadian-Literature-Into-Film-by-Peter-Dickinson.pdf
    • http://loaminoo.linkpc.net/3096099092095093/English-Lit-Relit-A-Short-History-of-English-Literature-from-the-Precursors-Before-Swearing-to-the-Pre-Raphaelites-and-a-Little-After-Intended-to-Help-Students-See-the-Thing-Through-or-See-Through-the-Thing-and-Omitting-Nothing-Unimportant-by-Richard-Armour.pdf
    • http://loaminoo.linkpc.net/5095099097094095/The-Columbia-Anthology-of-Modern-Chinese-Literature-by-Joseph-S-M-Lau.pdf
    • http://loaminoo.linkpc.net/4091094094090095/Anthology-of-Chinese-Literature-Volume-I-From-Early-Times-to-the-Fourteenth-Century-by-Cyril-Birch.pdf
    • http://loaminoo.linkpc.net/1090091093096090091/Talking-Literature-Essays-on-Chinese-and-Biblical-Writings-and-Their-Interaction-by-Raoul-David-Findeisen.pdf
    • http://loaminoo.linkpc.net/7091095095098091/Twenty-Thousand-Leagues-Under-the-Sea----Simplified-Chinese-Edition----BookDna-Famous-Children-s-Literature-by-Jules-Verne.pdf
    • http://loaminoo.linkpc.net/8094092098093092/History-of-English-Literature---Vol-I-by-H-Taine.pdf
    • http://loaminoo.linkpc.net/2099096092098090/A-Study-of-Old-English-Literature-by-C-L-Wrenn.pdf
    • http://loaminoo.linkpc.net/6090091093095097/History-of-English-Literature-by-Hippolyte-Taine.pdf
    • http://loaminoo.linkpc.net/509009

Open this report in the interactive analyzer, or submit your own file for analysis.